Microsoft CoPilot (which I equate with OpenAI ChatGPT, because MS basically owns OpenAI) already shows ads in it's chat mode. It's just a matter of time. Netflix, music streamers, individual podcasters, YouTubers, TV manufacturers – they all converge on an ad-based business model.
People consistently like free stuff more than they dislike ads.
Another instantiation: people like cheap goods more than they dislike buying foreign made goods