ChatGPT now knows what you do on other websites via ad collector
OpenAI's ad collector at bzr.openai.com sets a cookie called __obi, scoped to .openai.com. The value is while you are on ChatGPT and tied to your ChatGPT account. __obi is then sent to OpenAI from ordinary websites you visit. Any company that buys ads on ChatGPT installs a small piece of OpenAI code on its own site, the same way retailers already install Meta and Google tracking code. Loading that code, sends __obi to OpenAI along with data about the page you are browsing. This includes product
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