thegreatpretender - 8:32 am on Mar 22, 2007 (gmt 0)

I think what newborn was trying to say about the MFAs in his last sentence is something like this... Say I have a MFA website pumped up with lots of keywords for widgets. I display adsense, so the ads display will be for widgets. But hidden in the corner is also a link where I sell the old microwave. Now I bid adwords for widgets, CPA, and define the successful outcome as someone buying an old microwave from my site. Targetted visitors looking for widgets come to my site, and all of them will leave without even clicking on the microwave link. The visitors coming to my site won't cost me anything since none of them convert. And for those who leave via adsense,,... thats 100% profit for me. I don't even need to arbitrage. MFAs can only win.... and this time, win bigger by stealing your traffic without even giving you that $0.01 P/S: I dunno if you can choose advertisers in Googles PPA. If you can, then certainly the above scenario will not happen because you won't choose to display the MFA's ads in the first place.

That will not happen because the publisher is the one who'd decide which cpa ads to show on his/her website. Surely, you won't allow MFA site to appear on your site.