I personally recommend Hhampuz as he's the one managing the campaign that I am currently in. Also, yahoo is another campaign manager that has managed a lot of campaigns and known doing this stuff.
I see it the same way. I have worked with both
Yahoo and
Hhampuz for several years now and can highly recommend both from a campaign participant's perspective.
Who I have not worked with personally is
icopress, he also enjoys an excellent reputation in our German-speaking community as a bounty manager and also shows again and again with new ideas that he wants to get the best possible out for both sides - the company behind the campaign and also the campaign participants.
@OP, so I would just contact them and get in touch with the one that suits you best.