Some Libertarians appear to have an unshakable faith in their approach to minimal censorship up until there is a tech platform with a population larger than any country, and suddenly they couldn’t care less.
“Join another platform” at that point is like telling somebody to move to another country. It is only by sheer luck that the wealthiest (by many measure) country in the world still so highly values liberty that people aren’t having to think about “joining another country”.