@jasonkoebler I wonder if these sorts of sites could mitigate the flooding issue most of the way through policies and strict validation of the submitter. Since this one has shut down, it's hard to tell what they had, but some friction is necessary. Submit one piece of garbage, be put in purgatory for a time.
As for Amazon encouraging crap, well, they're blatant. What was their restriction, "only" three new books published per day / author? Ugh.