A researcher found ChatGPT's ad cookie on 12 shopping sites.
A security researcher published a teardown of OpenAI's advertising cookie on 20 September. The cookie is tied to your ChatGPT account and reaches OpenAI from sites like Wayfair and Coursera. OpenAI classes it as analytics, so refusing marketing consent does not switch it off.
Why it mattersPeople tell a chatbot things they would never post on a social network. Joining that account to your shopping trail builds an unusually complete profile of you.
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