I think the reason that very few communities support quality is because (as harsh as this sounds), there's very little quality. denmarkguy is perfectly accurate in his comment to your post on the subject.

I noticed whilst I was looking around that a lot of the communities have simply disappeared, even some which I thought would succeed. Those which are still going tend to have at least 1 very powerful user who seems to attract the authors. It feels a bit like Steemit's a very strange environment at the moment.