Lets clear things out a bit first. I am currently creating a social netorking site. I would like to add ads on it so i can create some income. What do you think would be the best solution for a social network? CPM? And if yes which campaign do you think pays more? An another question: CPM is cost per thousand unique views or cost per thousand impressions even if one user saw the ad 1000 times? Thanx a lot