Who is going to pay to post on twitter? Not only has he destroyed what was there but he's stopping any route for growth with new users. Most people won't bother.
He really has managed to destroy that company with his knee jerk decisions.
The people running the bots will pay because they'll still be getting an ROI. And once the people running the bots become Musk's most important revenue stream, his most important customers, what do you think that's going to mean for regular users' experiences?