Researcher discovers advertising tracker in ChatGPT

A researcher known as Buchodi reported that OpenAI has integrated a cookie-based tracking mechanism into ChatGPT. The system, codenamed bazaar, links user activity on third-party websites to their OpenAI accounts using an __obi cookie. According to the report, the tracker collects data including conversion events, hashed contact information, and location data such as zip codes. The researcher observed this behavior on Chrome for Android, noting that it affects both logged-in and some anonymous users.