I’ve seen keebinetters, but that feels like trying to say Massachusettsian instead of Bay Stater.
Kay-Binner seems like the most simple and inclusive, but that depends on the fact that you pronounce kbin Kay-bin
Maybe something representing the federated nature? Like Fedizen maybe?
Oh right, I guess it could just be Kbinner. I completely overthought myself into a dumb spelling while making the post! Lol