As far as I’m aware, only lemmy.world and some other instance I forgot the name of got defederated by them.

I am proud to be part of this new frontier

I honestly don’t know, but if I had to hazard a guess, it would be being able to interact with the Beehaw crowd.

My Kbin account has been seeing quite a bit of usage today if that counts.

I noticed it too. As a new (Less than a few hours old as of this comment) user, this is a hell of an introduction to the Fediverse for me.