People here speak of 'trimming the fat' - Can someone clue me in on how this is done? it seems to me you lose all tracking ability once the user is in the merchant's site?
help!...
BTW, I'm having the same problem with a modest affiliate (but parasite free!) network where I don't know which PPC is getting the sales.
As Ned suggests, Amazon will give you up to 1500 tracking ids. You need to write their support and make a formal request. I got 20 and they taught me an immense amount as to what works. It was like a whole new door opened to me.
patient2all
This can even be done with PPC->merchant.
it seems to me that this level of tracking and conversion can't be done by the majority of non network merchants... I know the one merchant I'm working with can't, unless I were to have 10 different accounts with them. hmmm...