Censored data presents a selection bias issue, but from what I can tell, Twitter's censorship seems to have little rhyme or reason. It is neither effective at suppressing lies and propaganda, nor effective at permitting reasonable discourse that falls afoul of some mob's opinion.

They still have every right to do it, but I'd be more interested in the merits of censorship if there was any institution that seemed to be doing a half-decent job of it.