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Community report links OpenAI’s ad collector to account-associated tracking

Buchodi.com reports that OpenAI’s advertising collector uses a cookie associated with a user’s ChatGPT account and receives it from other websites. The account identifies a collection endpoint and cookie name, but independent confirmation and the conditions governing transmission remain unresolved.

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Key points

  1. The report identifies bzr.openai.com as an advertising collection endpoint.
  2. It names the cookie as __obi and says its scope is .openai.com.
  3. Buchodi.com claims the cookie is tied to a ChatGPT account and sent to OpenAI from other websites.

Why it matters

Account-linked advertising collection would affect how users evaluate the boundary between ChatGPT activity and browsing elsewhere. The practical privacy question is what information accompanies the identifier and what controls govern collection.

What to watch

Look for reproducible network traces, OpenAI’s explanation of the cookie, and documentation covering consent, transmitted fields, retention and account linkage.

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