[crumoursegemo]

It sounds like your site is a general site that covers a lot of topics, which can be a problem for an ad network. Ad networks prefer to deal with niche sites and group them into similar-audience packages to sell to advertisers. For example Burst has channels for young fashionable females, young web-saavy men, moms, and sports fans. If they don't know where to put your site or who to sell your ads to that's probably the reason they rejected you. AdSense looks at the page and matches an ad based on the page content (or info they have about the user). Most CPM networks don't do that so they need to know who your audience is since that's how they're selling it. As a general, non-niche site you're only going to get cheap remnant inventory.

Ok so with all that said, I think in order for you to have success with CPM you need to classify your pages into categories so that a network could show food ads on food pages, mens ads on sports pages, etc. It might be worth reaching out to Burst and seeing if that's something they can do? But obviously you'll need some classification system on your end.

The other options is to find an ad network that sells ads based on the user rather than the site. I'm sorry I can't name any off the top of my head but I think that some exist?