I have a question though, if they don't have access to chats but they find out the enchilada ad was performing the best, something like this can provide enough information to be used to know about peoples private chats. When someone clicks on an ad you collect a fingerprint, then add more ads and fingerprint more and get a stronger picture about the individuals private chats in chatgpt.

If I were a large donor to a state that was interested in increasing action against abortion, I could hypothetically start running ads targeting people looking to get an abortion with a service that either provides assistance or other means parallel to assistance. If I target that state chatgpt would automatically match my ads to those individuals and I'd have my data. I could increase my donations to target and cull whatever little options those people have left.