I would go as far to say that if you are not in the know already just stay away from CPC shit on the major networks period, CPM is the way to go. Clickfraud is only getting worse and it's funny because even the people who are using it against others are having other clickfrauders use it on them as well because there's more then just one person doing it and as more people have it happen to them a percantage of them are going to look into how to set up or outsource bots of their own. Get a really good ad by doing lots of split testing and just run CPM.