We've been doong FB for almost a year now and have learned alot in this space, (with still alot to go). Here are some things that might help you. 1. The type of ad you run and the copy you use has a big impact on the user's behaviour. Not all ads are created equal. Good copy that really taps i to why someone should be clicking through and what value they can expect to attain the other end makes a big difference. But…
At the end of the day, if someone is advertising a product that is incredibly good, they should be able to use CPM instead of CPC. The point I am trying to make is that I believe the CPM model is dependent on making CPC & other more costly services look like a better alternative.