Follow people and the Microblog feed

So this has.me confused for some time now:

On kbin, I can follow other Fediverse users and see their Mastodon posts and all, but the accounts I followed do not appear on my Microblog feed. What's up with that? How am I supposed to interact with the followed accounts? I love that kbin wants to embrace everything Activitypub has to offer, but I didn't quite get behind this one.