Filter! Filter! Filter!
Rhetorical is dead on.. so is Gonzo and others who have posted. If you send shitty traffic to a sponsor then you'll get shitty results. Now, if you send good targeted traffic to a sponsor and it's not selling THEN you can talk about what a shitty job the sponsor is doing.
So let's say I am sending traffic to a great sponsor like
http://www.juggcash.com and sending it to a damn good converting site like
http://tour.bustyandreal.com/t1/ that is converting like hotcakes but for some dumb reason I wanna try another sponsor there and swap out Mr Billy Bobs Natural Big Boobs site and my sales plummet. THEN I can legitimately gripe about the sponsor as I went from mad sales with the Jugg Cash site to shitty sales with Mr Billy Bob's site.