It's also surprising because there are just fewer prominent kbin-based websites. Lemmy has lemmy.ml, lemmy.one, lemmy.world, and sh.itjust.works. And Beehaw, I guess, but they specifically throttle their growth.
kbin has kbin.social, and then a bunch of instances that are just way, way lower profile.
I mean, it's so surprising that we should probably question it a little bit.