I suspect there is something about the social dynamics of a small community vs. a widely used public network. Social network platforms (used loosely) have had t

I suspect there is something about the social dynamics of a small community vs. a widely used public network. Social network platforms (used loosely) have had this issue for a long time - consider "eternal september" and usenet. Reddit has some sub-reddits that are well moderated and have great contributors, as does HN (at least at its best). I'm not sure what twitter could do that wouldn't also reduce its audience and overall engagement. And one of the big factors with a small community are social norms - these aren't technical - though the platform can influence the incentives to maintain the norms.