Hey mates, my proxy network is generating about 10000~15000 imprs per day with 3000~5000 unique visitors at the moment. 30% from US, 30% from German and rest from other countries. I will sell banner ads in the proxified pages on the top of the page. I am offering two sizes of banners, 468x60 and 300x250, the prices are: for 468x60 banner (1 slot only): $0.03 CPM (imprs based), $12 per month at the moment for 300x250 banner (3 slots only): $0.05 CPM (imprs based), $20 per month at the moment one of my proxies for your reference: http://ivpn.info PM if you're interested.
Also I prefer if you're using some 3rd-party ads platform such as openx.org to count the imprs and also clicks