So I'm on the /r/Disneyland mod team and we decided to move here to @Disneyland / !Disneyland during the blackout. We're still directing users here in the subreddit's sidebar, although the mod team collectively decided to reopen the sub on Reddit after the admins started threatening mods directly.
There were a couple options floated when we were considering the move:
Make our own instance. Traditional forums like MiceChat have survived for decades; we'd effectively be a fediverse version of MiceChat. The main subject would be Disney, but we'd have Disneyland communities, WDW communities, Marvel communities, Star Wars communities, etc. This was shot down because we didn't have the funding, time, manpower, or legal expertise to host things ourselves at any kind of scale. All us mods have day jobs and we don't want to take on a full-time admin role; other Disney subs likewise didn't seem terribly excited about joining in. Shout-out to /r/startrek for starting https://startrek.website and /r/Android for https://lemdro.id/, but it wasn't in the cards for us.
Join a Lemmy server. This was before Lemmy.world existed, so our options were limited. We basically had Lemmy.ml, Beehaw.org, or sh.itjust.works. We disagree with the admins of Lemmy.ml on a fundamental level; Beehaw doesn't allow new communities; sh.itjust.works was maybe doable but we didn't want to deal with that URL for a Disney-themed community. Waiting for a new general-purpose instance to appear (what Lemmy.world became) just wasn't in the cards since I wanted it to be open during the blackout.
Join kbin.social. At the time, there were no other Kbin instances - fedia.io didn't exist yet. But Kbin seemed very flexible (direct Mastodon integration is a plus!), the admin team was just Ernest (but he had a good head on his shoulders), it was my personal fediverse site of choice, and it was growing quickly. At the time we made the call, federation didn't work as expected but it was promised to be fixed (and it has been; we now federate rather broadly).
We've gotten some organic activity on the Disneyland magazine over here on Kbin, which is nice because it shows we don't need to keep the community on life support. The big downside to Kbin (and Lemmy!) is that mod tools basically don't exist; it's going to be tricky without AutoMod long-term. Once Kbin has an API it should be trivial to remake AutoMod for Kbin though, assuming the API has moderation actions.
Ashtear