[ringm]

A reddit/HN-like voting system is inherently unstable, as some users just skim over top stories and upvote them, creating a positive feedback loop. If you have few submissions, this effect is weak. As the number of submissions, users and votes all grow linearly with respect to each other, the number of top stories and the number of stories an average user can read stay the same. This means the stream of new stories gets less and less readable, while top stories stay readable, which makes larger and larger percentage of users just skim over the top stories, and quality suffers. It would be interesting to create an accurate mathematical model of this behavior, maybe this would let us significantly improve stability.