Somebody please explain ad cpm and stuff like that (complete noob) For what I understand 400M pageviews = $400K a month just in ads (at just 1ct per pageview)
But basically CPM means cost per mille (thousand). I believe 1 cent per pageview is absurdly high for most CPM banner ads, with the real amount being closer to $.003. It all depends on how valuable a demographic you have (or mix of demographics) in the eyes of the advertiser, though.