My site (MovieForums.com) has been rejected by both Burst! Media, and FastClick - both CPM networks. One of them cited it's reason for rejection as my site being a message board, and the other did not specify, although I assume it was for the same reason.
Can anyone recommend a simple, reliable CPM network that will accept my site? It gets around 300-500 pageviews per day right now.
It'd be very hard to find a CPM network that will accept such a small site, let alone find one that will accept a forum site. Forum sites traditionally have very low CTRs and so they are not attractive to advertisers.
You'd make it easier on yourself finding a CPC network.