For me really i can say all of the campaign existing now are the best ones aslong as they pay well there's no really problem with it. But there are people that are selective on what campaign they are joining and those are people whos busy enough and can post only little for their spare time and that came they want to join campaigns like cryptomixer,safedice,secondstrade, and new one is heat ledger.
Not surprise that yobit is in the first place , because it has high number of enrolled members , but I think all other campaigns are better than yobit , even I see many members want to leave it if they get acceptance in high payout rates campaign , for me , I voted for Betcoin.ag campaign , because it has a good manger and high payout rates .
I dont really feel amaze also if many people selects yobit since we know that campaign have huge campaign participants and that campaign are good for starter who wants to earn money by just posting in behalf of their yobit sig.