Unfortunately, I haven't been able to find any that didnt cut out my impressions after a few days. Story is, my proxies recieve dozens of thousands of impressions a day on proxified pages. I know most of the smaller CPM companies are fine with proxofied pages. What I dont know is an CPM based company who'll actually pay me for my impressions without ridiculous and inaccurate stats. If you know of any CPM affiliates, please post them. Sidenote: I know this is clearly in the wrong section, but I could not think of a more relevent forum, so my apologies.
What are you using. If you are using popups then they are not going to track all of them as people have popup blockers. If it's CPM banners you are displaying them what stats program are you using. It is more likely that it's not the programs, but it's your stats that is inaccurate. If it's awstats then that's your answer. My awstats says I'm getting around 5,000 pageviews a day on one of my site's when infact its just under 2,000 pageviews as I made my own very accurate stats system that just counts the pageviews.
good luck finding one that will pay you for raw impressions. no good cpm network is going to want you since your going to serve hundreds of impressions per person.
I'm giving AdBrite another try. I didnt follow through with them last time. They're large enough not to care for my measly couple of thousand impressions a day, I hope.