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The math is only working for Google. Signing up for another program with on "on trust" would be foolhardy. Like all other publicly owned corporations, their alliegance is to shareholders, not advertisers and/or publshers.
Yes, I think Google sucks.
What's with the editing here. I can't use the word "#*$!?"
Suppose I purchase your product via an ad on a publisher's site and the publisher earns $X for generating that sale.
A few weeks later, I return the product to you for a refund. Do you get reimbursed by the publisher via Google or does the publisher keep the money?
Its probally too early to tell about refunds. There is no place in adwords for refunds.
In browsing through some of the offers available to publishers, I can see some products where there are going to be people trying to game the system.
Have a friend buy a product via your site, collect the "commission", have the friend return the product and then split the commission with the friend. Rinse, repeat.
Or people will have others to submit false leads, applications, etc.
If this is not already accounted for in some way by Google, I think advertisers should give it a lot of thought before using PPA.
I think this will fade just like CPM.
I'm (primarily) an AdSense publisher and I'm wondering if all the ads are being shown to all publishers who have been accepted, or if Google is only showing some ads to publishers. The inventory I see looks limited and the offers not very compelling.
Also, there's a thread from a publisher's perspective over on the AdSense board if you would like to read things from that point of view.