AdTrafficQuality - 3:55 pm on May 8, 2012 (gmt 0)
Hi everyone! I'm with the Ad Traffic Quality team at Google. We are responsible for the ad traffic across the AdSense network. We have recently put a lot of work into helping improve publisher (and advertiser) education by revamping our Ad Traffic Quality Resource Center: [google.com...] We hope that it is valuable to you as publishers and I suggest you have a look if you haven't already.
To the points on this thread, understanding the AdSense policies is very important. We want to ensure that everyone operates fairly in the ad ecosystem by following the policies that each publisher agrees to. As far as withholding earnings, when Google deducts revenue all money is refunded to the affected advertisers. This includes any revenue that Google earns.
Also it sounds like some of you are aware of the invalid activity form: https://support.google.com/adsense/bin/request.py?contact_type=invalid_clicks_contact&rd=1, which is the best way to let us know if you see anything strange or unexplainable! We constantly monitor the AdSense network, but being proactive as a publisher goes a long way to ensure that we can help protect the advertising ecosystem.
Ad Traffic Quality