http://www.nytimes.com/2007/03/21/business/media/21google.html?ref=business This is according to NYT. Its going on about how they are testing on a few publishers. It also compares Value Click's paltry revenues of just over $100 million agaisnt Google $10 billion.
they r moving to a CPA model literally. you never know if that would take off..CPC would continue to operate. hopefully CPA model will pay better..all unclear till we implement and try..but diversity is better
It also mentiones how publishers would not want to give too much ad space if the ads were not converting under CPA. if CPA does repalce CPC, I am sure the publishers will need to be compensated more i.e. get bigger percentage of the sale. IThey are currently testing it on 45 publisher sites.