guys, I just tried a site-targeted campaign, i found that "Max CPM" at least $0.25. is this right? how about your "max cpm"? (i think, this is too expensive.) Thanks for the info.
$0.25 is the min you can bid for a CPM campaign, not the max. You won't get much in terms of impressions for $0.25 - and you'll get zero impressions for that price on "good" sites.