To the OpenAI technical department
Preface:
Currently, eligibility for Google trials continues to be exploited. Unscrupulous vendors are still mass-generating fraudulent credentials applying them indiscriminately to both new and existing accounts and thereby reaping substantial illicit profits.
I will continue to provide updates on the official forums. Furthermore, as I consolidate the core technical procedures and vulnerabilities I have identified, I will post those updates here in this thread. If the official authorities choose to turn a blind eye and take no action whatsoever, then let us simply make the $20 Plus and $200 Pro tiers available as free trials for everyone.））
I am writing to formally report a serious and increasingly organized abuse of the ChatGPT Plus “first-month free trial” promotion, as well as the ChatGPT Pro subscription plan, both of which are currently being exploited through technical means in certain regions such as the United Kingdom and Japan. Based on sustained observation and analysis, certain unauthorized actors are leveraging advanced techniques to systematically intercept, manipulate, and resell promotional eligibility and subscription access at scale. This activity has evolved into a structured gray-market operation, posing significant risks to platform integrity, user security, and fair market competition.
1. Technical Methods and Operational Workflow (Key Findings)
The misconduct observed extends beyond simple account reselling and demonstrates a high degree of technical sophistication. The primary methods include:
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Traffic Interception (Packet Capture)
Unauthorized actors utilize packet capture tools to intercept and analyze network requests generated during the registration and activation processes of eligible users in designated regions (e.g., the UK and Japan). Through this process, critical parameters—such as subscription identifiers, regional markers, and promotional eligibility tokens—are extracted. -
Credential Extraction and Reverse Engineering
By analyzing API responses and validation logic, these actors identify key fields governing trial eligibility and subscription validation. This enables them to extract and reconstruct credentials in a transferable or reusable form. -
Cross-Account Reuse and Credential Replay (“Rebinding”)
The extracted eligibility credentials are reused or replayed across different accounts by modifying request parameters or reissuing intercepted requests. This allows promotions or subscription states—originally restricted to specific regions and user conditions—to be applied to other accounts, including those outside eligible regions or with prior subscription history. -
Extension to Paid Subscription Abuse (ChatGPT Pro)
In addition to the abuse of free trial eligibility, similar techniques are reportedly being applied to the ChatGPT Pro subscription plan. Unauthorized actors appear to exploit intercepted or manipulated subscription flows to provide access to Pro-level services at artificially low prices, further amplifying market distortion and platform risk. -
Commercialization and Gray-Market Distribution
These unlawfully obtained and reused trial entitlements and subscription accesses are subsequently packaged and sold through third-party platforms, social media channels, or private transactions at significantly discounted prices, forming a profit-driven gray-market ecosystem.
2. Risk and Impact Assessment
This behavior introduces multiple layers of risk and adverse impact:
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Violation of Platform Policies and Compliance Standards:
These actions clearly bypass the intended constraints of both promotional offers and paid subscription models, undermining enforcement of terms such as regional eligibility, first-time use, and non-transferability. -
Distortion of Market Pricing Structures:
Artificially low resale prices disrupt both trial conversion funnels and standard subscription pricing (including Plus and Pro tiers), compromising fair competition and revenue integrity. -
User Security and Privacy Risks:
Users engaging in such transactions may be required to share account credentials or undergo abnormal procedures, exposing them to account compromise, data leakage, or potential suspension. -
Increased Burden on Platform Risk Control Systems:
Abnormal activation patterns and fraudulent subscription behaviors may strain detection systems and degrade overall service reliability. -
Indication of Underlying System Vulnerabilities:
The feasibility of such exploitation suggests potential weaknesses in eligibility binding, token validation, subscription state verification, and anti-replay protections.
3. Recommended Technical and Administrative Measures
To mitigate and prevent further abuse, the following actions are recommended:
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Strengthen Credential and Subscription Binding Mechanisms
Bind trial eligibility and subscription states to multiple factors, including account ID, device fingerprint, payment profile, and geolocation data. Implement one-time-use tokens and stricter session validation. -
Enhance API Security and Anti-Replay Protections
Introduce robust request-signing mechanisms (e.g., dynamic signatures, timestamps, nonce validation) to prevent intercepted requests from being reused. -
Reinforce Regional and Eligibility Verification
Apply multi-layer verification for regional eligibility (IP address, billing information, Google account region, etc.), and flag anomalous cross-region activities. -
Upgrade Anomaly Detection and Risk Control Systems
Deploy advanced monitoring models to detect abnormal trial activation and subscription patterns, including high-frequency activations and cross-account irregularities. -
Crack Down on Unauthorized Resale Channels
Identify and penalize accounts and entities involved in resale activities, and collaborate with relevant platforms to remove illicit listings. -
Improve User Awareness and Risk Communication
Clearly inform users about the risks associated with purchasing services from unofficial channels.
4. Formal Request for Action
In light of the above, I respectfully urge OpenAI to:
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Conduct a comprehensive technical audit and security review of both trial and subscription systems (including Plus and Pro tiers);
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Promptly identify and remediate any existing vulnerabilities;
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Investigate and eliminate ongoing abuse activities at scale;
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Enforce strict penalties against accounts and entities engaged in such misconduct;
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Continuously enhance risk control mechanisms to prevent recurrence.
This issue not only threatens the stability of the platform’s commercial model but also directly impacts user trust and brand integrity. Swift and decisive action is essential to restore fairness, ensure compliance, and maintain a secure and transparent service environment.
Thank you for your attention to this matter. I am willing to provide additional technical details or supporting evidence if required.
