alt Hacker NewsAds aren't just for click through, they are for suggestions, and mind share as well.
You can't click on the budweiser logo when watching super bowl ad. But if you sit in your chatgpt window all day then it's probably worth it for advertisers to expect to build familiarity with brands they advertise.
Really depends what the ads are. If they are popups or other intrusive ads the product will just die. If they are subtle hints in the text how are you going to track it. I don't know, I just don't believe in ads, but then again I am dirty commie so who am I to tell you not to