Ok, I clearly should have made the wording more explict since this is the second comment I got in the same vein. I'm not saying you'd convert users to $1/month subscriptions. That would indeed be an absurd idea.
I'm saying that good-enough LLMs are so cheap that they could easily be monetized with ads, and it's not even close. If you look at other companies with similar sized consumer-facing services monetized with ads, their ARPU is far higher than $1.
A lot of people have this mental model of LLMs being so expensive that they can’t possibly be ad-supported, leaving subscriptions as the only consumer option. That might have been true two years ago, but I don't think it's true now.