507 points•361 comments•4d ago•by lmbbuchodi•buchodi.com ↗

How ChatGPT serves ads

The article explains that ChatGPT injects ad units into the conversation stream and ties each ad to a four-part Fernet-based attribution loop (ads_spam_integrity_payload, oppref, olref, ad_data_token) for reconciliation of impressions and clicks. A merchant-side OAIQ SDK in the user’s browser collects post-click data via first-party cookies to support attribution, with ads loaded from OpenAI-hosted creatives. The piece provides observed examples across several brands and notes contextual targeting by chat topic, as well as the domains involved in ad data collection.

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