For 10 posts a week (or less), I don't find it significantly impact junk post because we will get 10 posts anyway except really busy IRL. The real danger is when the campaign demand more posts and/or stakes based on post counts.
You would think that people getting paid to post would at least take some time in their replies and make a thoughtful post. But, it's just too easy. The criteria is way too low, and I do understand that the more people, and more posts the better advertising. But, if it were me who brought out something worth advertising I would want to best quality posters rather than hiring a bunch of Jr Members who have only ever posted in off topic and spam megathreads.
Seeing the stuff that gets advertised here - they probably want the opposite. It's the same reason why Nigerian scam e-mails are written in horribly broken English. Someone dumb enough to fall for such e-mails is a perfect mark. Someone dumb enough to click on some shitcoining ICO ad under an incomprehensible Google-translated word salad is a perfect "investor" for said ICO.
I wouldn't mind if theymos strong-armed the campaign managers into some sort of responsibility. Probably not gonna happen though.