Depends on the project, and I imagine a lot of the smaller ones are your standard FOSS BDFL leadership.
In my case I'll likely make a rough milestone list based off our NLNet memorandum and go from there.
@j12t@j12t.social pixelfed is broadly compatible with Mastodon, no? Unless of course the pixelfed account uploads more than 4 photos...
I'd say support for threadiverse platforms is mediocre at best.
@trwnh@mastodon.social sure, makes sense. That to/cc already exist in the wild as arrays means one less thing to worry about with multiple cross posts.