google launching pay per action ads
Google is launching pay per action advertising. Adwords, google’s ad program has traditionally been pay per click. Advertisers that are concerned that people may click without following a particular action (such as purchasing) may be particularly tempted. This way, specified actions should follow clicks before the advertiser pays out.
http://services.google.com/payperaction/
FAQ: http://services.google.com/payperaction/faq.html
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