NextBlock™ Privacy Policy

Effective Date: August 1, 2025

This Privacy Policy governs the collection, use, and protection of information through NextBlock™, including its application, Billboard. NextBlock leverages Nostr, which is a decentralized protocol where most data, such as campaign content and events, remains publicly accessible via relays. These relays are servers that distribute and store information openly for anyone connected to them. Buyers and sellers control their cryptographic keys, but their privacy depends on their own actions, such as securing their keys or using VPNs, as well as the policies of the relays they connect to, not solely on NextBlock. By accessing or using NextBlock, you agree to be bound by this Privacy Policy.

Section 1. Introduction

This Privacy Policy is a legally-binding agreement between you and NEXTBLOCK INC., a Texas corporation, doing business as NEXTBLOCK™ ("we" or "us" or "our" or "NextBlock"). By using or accessing our Website and Products and Services, you agree to be bound by the terms of this Privacy Policy and our other Terms (see below).

If you object to anything in this Privacy Policy (or otherwise do not understand or agree to be bound by this Privacy Policy), then do not use our Products and Services. If you use our Products and Services in any way, you acknowledge that you have read, understand, and agree to this Privacy Policy.

We may change this Privacy Policy at any time. We will provide you with notice of any material change and tell you the date on which such changes will be effective. We may provide this notice to you by email or by posting a notice on the Website. It is your responsibility to review any changes to this Privacy Policy. If you object to any of the changes to this Privacy Policy (or otherwise do not understand or agree to any of the changes to this Privacy Policy), then do not continue to use our Products and Services. By continuing to access or use our Products and Services following notice of any change to this Privacy Policy, you acknowledge that you have read, understand, and agree to this Privacy Policy as changed.

You may print a copy of this Privacy Policy by using the print button or feature in your browser. We suggest retaining a copy for future reference.

Section 2. Our Rules and Policies

This Privacy Policy, our Terms of Service ("Terms"), our Relay Policy, and our DMCA Policy are the Rules and Policies that apply to and govern your access to and use of our Products and Services. Please see our Terms for more information on our Rules and Policies.

This Privacy Policy is incorporated into and is part of our Terms. Any capitalized terms not otherwise defined in this Privacy Policy are defined as set forth in the Terms.

Section 3. Definitions

The following terms have the meanings set forth below when used in this Privacy Policy:

"Buyers" means individuals or entities who purchase advertising campaigns on NextBlock by submitting a budget and bid rate to promote content in Billboard for views by sellers.
"Sellers" means individuals or entities who opt in to view promoted content in Billboard, set their price for attention, and receive BTC payments for such views.
"Billboard" means NextBlock's application interface where Buyers' campaign content is promoted and Sellers view such content for compensation.
"BTC" means Bitcoin.
"Campaign" means the advertising effort purchased by a buyer, consisting of content (video, caption, hashtags, and optional title, call to action, and link) posted to Nostr and promoted in Billboard.
"Nostr" means the decentralized protocol and relay system utilized by NextBlock to post and store campaign content and related events (e.g., bids, matches).
"Nostr Build" means the third-party service that hosts images for campaign content posted to Nostr and promoted in Billboard (see https://nostr.build/tos/).
"Service Fee" means the twenty percent (20%) fee Buyer's pay to NextBlock, based on Buyer's submitted budget.
"Strike" means the third-party products and payment services of Zap Solutions, Inc., doing business as Strike or Strike.me and Zap Solutions Capital, Inc. (collectively, "Strike"), used by NextBlock to process buyer payments and disburse BTC to sellers via the Lightning Network (see https://strike.me/business-terms/).

Section 4. Information Collected

NextBlock collects various types of information from buyers and sellers to operate its decentralized content promotion platform. For buyers, NextBlock collects an email address for sending receipts, which NextBlock holds and does not post to Nostr. NextBlock also collects campaign content, including a video, caption, hashtags, title, call to action, and link, which is publicly posted to Nostr. Additionally, NextBlock collects payment data processed by Strike, which NextBlock does not store itself. Finally, NextBlock collects Nostr events, such as bids and matches, which are publicly stored on the NextBlock relay. For sellers, NextBlock collects an email address for sending notifications, which NextBlock holds and does not post to Nostr. NextBlock also collects Nostr account details, such as the public key, for establishing identity, which are publicly visible on Nostr. Additionally, NextBlock collects Strike account linkage information for payments, which is handled by Strike. Finally, NextBlock collects view data and events, such as matches and payouts, which are publicly stored on the NextBlock relay. NextBlock collects technical data, including IP addresses and device identifiers, to ensure Billboard functionality. These are visible to relays when connecting but are not embedded in events. NextBlock collects this data minimally and does not use it for web tracking.

Section 5. Use of Information

NextBlock uses the collected information to facilitate its services for buyers and sellers. For buyers, NextBlock uses email addresses to facilitate the delivery of receipts to buyers. NextBlock uses campaign content, which is posted to Nostr via buyers' cryptographic keys and becomes visible to anyone on connected relays. NextBlock uses payment data to support transactions through Strike. NextBlock uses Nostr events to manage bids and matches, and these events are publicly logged on the NextBlock relay. NextBlock promotes campaign content, including the title, call to action, and link, in Billboard without engaging in behavioral targeting beyond matching bids to seller prices. For sellers, NextBlock uses email addresses to provide notifications about their activities. NextBlock uses Nostr account details to establish seller identity, and these details are visible across relays. NextBlock uses Strike linkage to enable BTC payments to sellers. NextBlock uses view data and events to support matching and payment processing, and these are publicly logged on the NextBlock relay without any cross-device tracking.

Section 6. People Under the Age of 18

If you are under the age of 18, you may not use our Products and Services. We do not knowingly or intentionally collect or solicit any information from people under the age of 13.

Section 7. Information Sharing and Disclosure

We do not sell, rent, or share your information with third parties except in the following circumstances: (a) when we have your permission or pursuant to your request; (b) to process or facilitate transactions (including payment, refunds, etc.); (c) in response to subpoenas, court orders, or other legal process; (d) to establish or exercise our legal rights or defend against legal claims; (e) upon receipt of a written request from law enforcement; or (f) if we reasonably believe that doing so is legally required or is in our best interest to protect its legal rights or the legal rights of others. Additionally, if we are acquired by or merge with another company, you agree (to the extent permitted by applicable law) that we may transfer your information to such company. In this event, we will notify you by email/or a prominent notice on the Website of any choices you may have regarding your information before your personal information is transferred and becomes subject to a different privacy policy.

NextBlock shares information in the following ways:

With Nostr, campaign content, including the video, caption, and hashtags, is posted publicly by buyers via their cryptographic keys. NextBlock does not independently share this content beyond facilitating the posting process.
With Strike, payment data is transmitted to Strike in accordance with their Terms of Service (https://strike.me/business-terms/).
On the NextBlock relay, events such as bids, matches, and payouts are publicly accessible and unedited by design of Nostr. Anyone connected to the relay can view these events, and NextBlock does not engage in additional sharing beyond this structure.
NextBlock does not sell information, engage with data brokers, or participate in surveillance networks. However, campaign content and events remain inherently public on Nostr relays and are not confined to NextBlock's control.

Section 7. Rights of Buyers and Sellers

Buyers and sellers located in California may request access to or deletion of their email and view data held by NextBlock under the California Consumer Privacy Act (CCPA). They can submit these requests by contacting [email protected]. However, events and campaign content stored on the NextBlock relay cannot be deleted by NextBlock due to Nostr's decentralized design, where control rests with relay operators and the broader Nostr structure. Since NextBlock does not sell data, a "Do Not Sell My Personal Information" option is not necessary.

Section 8. Retention

We will retain your information as long as reasonably necessary to provide you with our Products and Services. Additionally, we may retain information from any closed account for a certain period of time to comply with legal and regulatory obligations, resolve disputes and claims, prevent fraud, collect any fees owed, assist with any investigation, enforce this Privacy Policy and our Terms and take any other actions permitted by law, and otherwise use and disclose in a manner consistent with this Privacy Policy.

Further, NextBlock retains data as follows:

Events, such as bids, matches, and payouts, are stored on the NextBlock relay, which is a component of Nostr's distributed network. This retention is governed by the NextBlock relay's retention policy.
Campaign content posted to Nostr is retained by Nostr Build in accordance with their Terms of Service (https://nostr.build/tos/).
Email addresses of closed accounts are retained by NextBlock for one year, after which NextBlock deletes them.
Payment data adheres to Strike's retention policies.
NextBlock does not control the retention of public Nostr data beyond what is stored on its own relay.

Section 9. Security

NextBlock employs robust encryption and sound practices to safeguard email addresses and Billboard access data that NextBlock holds directly. Campaign content and events stored on Nostr relays are public by design, meaning NextBlock cannot encrypt or shield them. Buyers and sellers must secure their cryptographic keys and may consider using VPNs to protect their IP privacy when connecting to relays. While no system is impervious, NextBlock remains committed to protecting the information it directly controls.

We have implemented certain technical, physical, and administrative policies and procedures to prevent unauthorized access, maintain data security, and avoid improper use and disclosure of your information. The level of security used is based on the type and sensitivity of the information being protected.

Although we have taken these measures and safety precautions, we cannot guarantee that your information will never be accessed, disclosed, altered, or destroyed in a manner that is inconsistent with this Privacy Policy. If we discover any unauthorized access to or use of your information, we may attempt to notify you electronically so that you can take appropriate protective steps. By using our Products and Services or otherwise providing personal information to us, you agree that we can communicate with you electronically regarding security, privacy, and administrative issues relating to your personal information and your use of our Products and Services. We may post a notice on the Website if a security breach occurs. We may also send an email to you. Depending on where you live, you may have a legal right to receive notice of a security breach in writing. To receive free written notice of a security breach (or to withdraw your consent from receiving electronic notice) you should notify us.

Section 10. California Privacy Rights

If you are a California resident, you may have certain additional rights.

California Civil Code Section 1798.83 permits you to request information regarding the disclosure of your personal information by us to third parties for the third parties' direct marketing purposes. To make such a request, please write to us at the address provided in Section 12 below.

California Business and Professions Code Section 22581 permits registered users who are minors to request and obtain deletion of certain posted content. To make such a request, please write to us at the address provided in Section 12 below.

Section 11. Third-Party Websites and Services

(1) Our Website and our Products and Services include links to other third-party websites and services that are not owned or controlled by us. Please be aware that we are not responsible for the privacy practices of these third-party websites. We encourage you to be aware when you leave our Website and to read the privacy policies of each and every third-party website that collects and uses your information.

(2) We may share your information with certain third-party service providers who provide services to us or to you in connection with your use of our Products and Services, including as provided in Section 7. We require that these service providers only use your information in accordance with our instructions and to provide the services requested by you or by us. You acknowledge that you are not a third-party beneficiary to any contract or agreement between us and any third-party service provider.

Section 12. Contact Information

For questions regarding this Privacy Policy, please contact [email protected].