The rest we upvote 20% to some quality posts daily...in saying this...some no longer make an effort to create good ones.
This is a common issue, I think sndbox suffer from this slightly, but then again they also manually curate and have voting % bands - including no votes for no effort I hope!
Ours was solved..i can't speak for other curation groups. There is upvote for upvote that's happening to those with no SP or less SP groups. Quality is shiite..so how to solve that I dunno..there are a few of them nowadays. And uncontrollable. Heaven forbid that they will be given delegations.
What do you use for your plagiarism checker? We've just got grammarly.