As far as I know, Twitter is on AWS, and Bezos is Musk's direct competitor outside of twitter. I wouldn't be surprised if Musk leveraged his own platforms to bypass the censorship or obstruction. Nowadays people are aware of the monopoly on cloud services and are gearing up against it.
AFAIK Musk doesn't (currently) own anything that could counter AWS stopping hosting Twitter. Starlink comes closest, and it's really a different thing. Regardless of the trend, I'm not sure it's easy to counter stopping hosting Twitter just yet.