I'd add also a few points * Unappealing UI makes the site look boring. Furthermore, users have to be comfortable with the fact that there's no "easy" content,

I'd add also a few points * Unappealing UI makes the site look boring. Furthermore, users have to be comfortable with the fact that there's no "easy" content, I.e., memes and one liners. * Comment score is mostly irrelevant, so users don't try optimizing their score. This leads to better discussion. * Only one board. Things stay on topic, as users from that toxic subboard don't leak elsewhere. So "bad" types of users don't have a place to hang out here, unlike Facebook or Reddit. I'm much happier commenting here than on Reddit. It's demoralizing to put effort into a comment and then be buried under one liners and memes.