As I wade waste deep in plagiarism and abuse every day, I think the biggest problem is that @ned and @dan have not taken an official stance on this.
It has so far been a community decision to not want copy-paste -- and actually, less than that, it is a vigilante decision. There are many users and many whales who still upvote copy-paste and do not care.
Most people just ignore cheetah and continue, only a few vigilantes downvote the copy-paste post, and even fewer upvote cheetah.
Unfortunately, as more and more plagiarized posts hit the trending page from whales who do not care, it will just perpetuate the plagiarism as people realize how much easier it is to make money this way.
It's a serious problem that is building and building, and I have no idea how to stop it.
It does seem to be getting worse and you being at the coalface obviously see this. I have noticed that it is often the good ones which are copied obviously the reason they seem good half the time.
The whole community, well the genuine part are behind your efforts. I hope we can turn it make a difference to the tide