Thank you for this very informative post. I have been advertising my sites on the PPCs for over 4 years now. The amount of fraud has increased substantially over the course of the past two years. The fraud clicks are tremendous and ever increasing month after month. The ppcs allow this fraud because they make more money themselves. The amount of legitiment traffic that could be sent by the remaining ppcs that allow online gambling ads would be approx. only 10% or less of what they show sending. Bottom-line is ROI is evaporating from ppc ad campaigns to the extent that most advertisers left will scale back or discontinue buying ppc clicks. Several of us have complained many times to our ppc reps only to get bullshit answers time in and again. As far as good advertising resources on the Internet, there is none in my opinion at this time. There is so much fraud on the Internet that it is sickening. In the long run, I can’t help but to believe that the ppcs will lose in the end.