Then the spammers would use bots or cheap Chinese labor to downvote their competitors. It would just move the problem down a level. For this sort of thing to

Then the spammers would use bots or cheap Chinese labor to downvote their competitors. It would just move the problem down a level. For this sort of thing to work, the curators must be trusted, which is expensive. Such an engine might be worthwhile to a small subset of users, though.