The author of the report boost things about adsense and focus some other affiliates program instead. My experience with Adsense is very bad. Some mischievous people have done invalid clicks on my site and finally adsense ban me from the program wheni request payout. Technically Adsense never stops these invalid clicks and use this reason to ban the publisher accounts and saves a lot of money. I never heard that the affected advertisers get back money from Adsense due to invalid clicks.