leaving Mastodon out to try
While it’s clear what’s meant from the context, I’ve never heard this idiom. Do you mean “hanging Mastodon out to dry”?
Drop in the bucket sounds weird to me too, but a quick check shows that it’s the US version of drop in the ocean.
The botsin.space Mastodon server shutting down is sad news, it’s a pretty important server and if you didn’t like bots it was handy that you could just block one server and block loads of them at once.