pay per click

Why advertisers are so happy about Google pay-per-action advertising program?
Google is the largest online advertising company and proven to be generating effective results for advertisers. And now their new pay-per-action advertising is like giving free ads to advertisers. Advertisers who launch a pay-per-action campaign only pay when a visitor taken an action. An action can be a sale, a lead, sign up of any kind of offers and subscriptions, etc depending on the specifications of the advertisers. So it will save a lot of advertising costs for advertisers as they pay for result only.

My personal opinion on how AdSense will be affected by the pay-per-action program
Google clearly stated that the pay-per-actions will appear only in AdSense publishers sites and blogs of their content network. If most of the advertisers is using pay-per-action ads instead of pay-per-click ads in the future, in my opinion this will greatly affect AdSense earning of webmasters and bloggers. I guest that niches that works well in cost-per-action ads all the times will make more money from AdSense, may be a shocking increase in their AdSense. On the other hand, niches that aren't suitable to cost-per-action ads and are currently relying on cost-per-click ads will experience a drop in AdSense in the future.