Musk can do whatever he wants, keeping Twitter (sorry, X, yuck) alive with billions that are peanuts to him. This news isn’t a surprise to me. He talked big about free speech, but it was just talk.
Musk's "free speech" is a lot like the Lost Cause's "states rights": a fig leaf that intentionally tries to distract from the fact that the only speech/right of concern was that of the most repugnant behavior.