Content creators on digg wanted their content to be viewed too. Every social media org should have a framed copy of ozymandius on the wall.

Comments are content too and often more insightful. Moderators for all the bashing some deservedly get are key to keep content creators happy. Each forum is a small organization. The sum of the heads of these orgs. and the identities of users is what makes Reddit valuable. We are however entering an age where identity becomes more portable so mess with all the leads of your teams at your own peril.