I got on Beehaw no problem... I guess read their philosophy a bit carefully and think about what you actually want to contribute there?
I've only made a few comments so far, but whenever I have, I've gotten a helluva lot of upvotes and often insightful, engaging, thoughtful replies. It seems to be a really good place for positive, in-depth discussion. Beehaw comments tend to be paragraphs, here's its more a few sentences a la Reddit.
I think Kbin's got a solid foundation feature-wise, but so far the discussion depth on Beehaw feels deeper. At the same time kbin feels a bit more alive whereas Beehaw's pace feels a bit more gentle.
Let's see how things play out over the next month.