Anyone knows when adsense will launch a CPA program?? This can be an interesting feature added to the existing adsense program and i am sure that the publishers and advertisers will have more to win from this.
No idea. I believe they have only mooted the idea, so it could take a while before they implement it.
Advertisers will, but Google won't. Why would they want a performance based system when they know the performance is declining? Any AdWords advertiser will tell you it got more expensive over the last few years and less effective (compared to the effort you put in). Google profits from getting the money based on clicks. By allowing MFA sites, they even fetch multiple clicks before sending a buyer to the advertiser. They'd shoot themselves in the foot if the went CPA and nog catch all those clicks.
The idea is to pay lower fees for clicks and get more from the sales advertisers will do from AdWords. I think that this will increase the thrust in their network.