Ads are coming to ChatGPT. OpenAI is attempting to head off some of the inherent misalignment with ads and users by outlining some ad principles:

Ads do not influence the answers ChatGPT gives you. […] We keep your conversations with ChatGPT private from advertisers, and we never sell your data to advertisers. […] We do not optimize for time spent in ChatGPT.

The problem is once you’re making money with ads, it’s hard not to optimize for more ads. I just hope ads will remain a small part of their business compared to Plus and Pro subscriptions.