[_delirium]

Advertising rates vary a ton, so it's hard to answer in general. But in many areas you can get much more than the $0.10 per thousand impressions you cite as a breakeven point on bandwidth. It's not unheard-of to get $10-30 per thousand impressions, at which point your bandwidth costs are <= 1% of advertising revenues. I get $20 myself on one site, though it's admittedly low-volume, so it's quite possible it'd go down a lot if the visitors increased beyond the current niche of very relevant users.

[potatofish]

Thanks for this answer. Is there a resource that covers in general what advertising rates are expected to be in different situations and with which ad networks?