[rehack]

> It would allow us to more easily control the content quality and guard against pr0n, which would hopefully get us back into the good graces of top tier advertisers

I bet this is your main problem. Having experience with a site which has similar numbers (less in fact), I was surprised to know that you are able to generate only so much, as to cover hosting expense. And on that related note, which is another "top tier advertiser" network other than Google's?

The only other reason I can think of is you having a very high bounce rate, something above 90%?

Sorry, for being (inadvertently) blunt. But this is my area of some experience and also interest.

[dumbfounder]

The bounce rate is 60.5%. We do have a lot of international traffic which adds to the monetization challenge.