I started out by testing a group of domains that had averaged $8 per day at Domainsponsor in the first 12 days of July. At Klickerz the group averaged about $13 per day. Not every domain did better but enough did significantly better to bring to total way up. I have since moved more domains over and they seem to be doing fine. I was testing 4 domains at namedrive previously. I moved them over to Klickerz and on the second day they did better than most days at Namedrive.
My only concern is the long pay cycle. Apparently 45 days after the end of the month is when you get paid. After I receive my first check I will post a more complete review with stats and comparisons. After testing NameDrive, Domainsponsor, TrafficClub and Klickerz, I am pretty sure that Klickerz and DomainSponsor is where I will keep all of my parked domains.