I was curious about about what other peoples results are?

I did a very small ad campaign Costing .1 BTC

Stats from my referral page relating to the ad campaign

34 Vists
3.53 PagesVisit
Avg visit duration 3:37
% New Visits 94.12%
Bounce Rate 38.24%

If click fraud was happening I would think the avg visit duration would be very low and pages/vist would be 1.