No they only create spam if you don't check their recent posts before letting them join and if the past post quality is bad you do not let them join quite simple. Then you make a warning that if their is spam you will not receive payment and more than likely will be ban, after they see one or two people getting banned they will soon sort out their post quality as Dadice has and it will improve further i am sure.

Either way that would be good to start marketing your site anyway possible because i have tried it and it does not get the traffic it deserves if i am honest so would be good to see higher volume of betters.

Good luck.