From the comments: >OpenAI are “spying” on ChatGPT sessions the same way that email providers “spy” on your email to filter spam. This sounds like a variation

From the comments: >OpenAI are “spying” on ChatGPT sessions the same way that email providers “spy” on your email to filter spam. This sounds like a variation on “Google is reading your email”. Yeah, but Google is actually reading your emails. They build a profile of everything you buy from emailed receipts, and use that data to target ads at you. It's definitely not about improving the user experience, like a Spam filter accomplishes...