Do they get adopted by other instances? Are they still accessible from other instances? Can you still post on them from another instance?
Edit: From my understanding every instance that deals with a community has a cached copy. Will that copy disappear after a certain time, because it can’t phone to home anymore?
I’m hoping for account linking so you can have multiple synced accounts between instances so if one goes down due to load or permanently you can seamlessly continue without any issue.