Feedbackity is a pretty new site, and there arent any payment proofs floating around the internet as of now. I recently got paid by them and would like to upload one. So here you go
All payments from ySense (formerly Clixsense) go here.
Payment Proofs from Testable Minds
All Robson Payment Proofs go here.
Neevo Payment Proofs
All Lionbridge Payment Proofs go here.
All Oneforma Payment Proofs go here.
All Payment Proofs from Usertesting go here.