So you went and thought: "Let's take this chance to make an unverified claim and advertise this other instances in a single post!"
but it was a shitty move, let me tell you.
I get what you're saying, I think most people fear that instead FB's septic tank will spill and spread in the Fediverse instead; I already had to deal with some "FREE SPEECH!" guy that wanted it to be a platform where people for example from Hamas and Israel could discuss and "agree to disagree".
Like I linked in the OP post, the problem isn't their implementation of the protocol, but what FB is, and what it has done; and it probably would not stop doing it in the Fediverse. If Hannnibal Lecter moved in the neighbourhood I wouldn't answer his dinner invite, just to see what's on the menu.