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’ve been wondering about this also since I started a new community in the last week and have already invested a fair amount of time into it. I’m hesitant to keep investing time and effort, though, if it can just disappear with no recourse.