I have ran many tests and have noticed that certain niches produce better results for PPC and CPM. The CPM's that I ran were more of dating and education type CPA offers and I had a pretty good CPC rate without paying for CPC rates - if that makes sense For CPC i would say clickbank products in the weight loss and make money online is the best way to go! If you have used any of them... which one do you think it better?