[wiwillia]

Have you considered trying another way to monetize? Selling merchandise, especially if you have an engaged audience, tends to have a higher effective CPM ($20-100+ in our experience) and can be run simultaneously with ads.

Teespring (disclaimer: I'm a co-founder and t-shirt addict) can be an effective tool for doing just this. We ship hundreds of thousands of products each month, you get retail quality products and margins as though you were paying up front.

Absolutely no risk and no costs. You'll never pay us a penny, we only make money if you do.