In fact, IS there even an exjw community?
It depends on how you define the term.
We do tend to use the term "community" to describe a group of people with a common interest or trait. I'm an atheist, so I belong to the "atheist community." I'm an exJW, so I belong to the "exJW community." If I take up guitar playing, I suppose I'll become part of the "guitar-playing community," which is necessarily a subset of the "music community."
But I think of a community as something you help to form or join and become an active part of. I guess you could say I am a part of the community that is this message board, since I joined it and take part in discussions here. But I'm not active in any other part of the "exJW community." So am I a part of it? Or am I just an exJW? I think it's the latter. Under this definition, there is no such thing as an overarching exJW community. Just exJWs, some of who form small communities.