ChatGPT Plus Subscribers Are Your Most Valuable AI Visitors — And Least Visible
ChatGPT applies noreferrer to outbound links in paid-tier chat replies, stripping referrer data from the 50 million Plus, Pro, and Business subscribers whose clicks carry the highest purchase intent. GA4 classifies these sessions as Direct. The result is a value-selection bias — the AI visitors most likely to convert are systematically the ones your analytics cannot attribute. Free-tier citation links carry utm_source=chatgpt.com, so GA4’s visible AI traffic is structurally skewed toward lower-intent users.