The idea of combining the two isn't necessarily bad, Kbin has some good ideas and I guess that's why it's gotten popular, there are just some baffling stuff too.
The leftover terminology from Mastodon makes some sense (haven't used that one myself), maybe the founder thought the majority of users would join from there, but the magazine thing just confuses me since they are clearly just communities filled with threads. When I browse single picture meme posts or questions on AskKbin my first thought isn't "ah yes, Articles in a Magazine".