Pay per signup networks are such as Peerfly | CPA Networks
and pay per survey are cpalead,blamads,thinkaction etc.

MaxBounty, PeerFly, Adscend Media, PointClickTrack, BLAM Ads and Adwork Media, just check them out

List of networks, take those and search for user feedback. Start in the forum, then check other forums, Google etc.

Peerfly, Maxbounty, Adcendmedia, Gooffers and many others!