That's the great thing - you can set very reasonable donation levels (we have one for £1/month) and it doesn't require a need a lot of people to chip in for you to get the monthly hosting costs covered, without eating into your "war chest" which can help get you through any "shocks" like another Rexxit or having to change hosting or something unforeseen (making the news, some other social media enshittification, etc.).

That price point makes other, topic-specific instances (which I am a big fan of), very viable.