Just to be real:
Every instance is an example of arbitrary censorship. It's just that .ml is specifically about a kind of censorship you don't like.
All that said, there is no "should". Donations are voluntary, they are not the only way to contribute to the development of the fediverse, and there is already both alternatives and competition, and you could support those instead. I hear Pixelfed is making the rounds.
Literally look at Truth Social. Or better, don't. For a social platform to be healthy, it needs to be censored for poitical reasons. It's just the political reasons have to be about, and for, good.