Hi! I'm running a spanish forum that has over 300.000 impressions a month (50% Spain, 50% South-America). I'm looking for an advertising company that can serve banners and popup or unders and that pays a reasonable CPM. Also I want them to be able to fill at least 50% of the impressions. Any suggestions are welcome. Thanks in advance.
try paypopup and/or value click media. you can read about them here: http://thebestpayperclick.blogspot.com/ value click media might not accept you because your website is 100% forum.
you can try uggitraffic.com or look for other adnetworks in my sig. uggitraffic gives $1.00 cpm per UV Tiered traffic.