Search Engine Watch Forums moderator, Discovery, has been noticing weird conversions sent from Google's Pay Per Action model. He asks in a Search Engine Watch Forums thread if there are AdSense publishers gaming the referrals 2.0, i.e. Pay Per Action, model released recently?
We have seen a rash of erroneous conversions over the past few weeks from our PPC content match campaigns. I am not 100% certain as to how Adsense partners are evaluated however, I do believe that many adsense publishers feel that the better their conversion stats now, the more likelihood they will receive benefits in the future.
It would not surprise me if some Google AdSense publishers are trying to game the system. Discovery asks, "What safeguards will Google have to stop this type of activity?"
Maybe more of that information at Google AdSense PPA Help, but I don't see it specifically mentioned.
Forum discussion at Search Engine Watch Forums.