My click through ratio never gets that high, I myself have adsense on one of my hosts and never had an issue. Also, keep your image hosting site in mind when posting in your daily forums too if they allow it.

As far as clicks go, well my other image hosting site uses BL Ads and it gets insane clicks from horny mofo's, lol. On my non-nude site I've had 20-30 clicks for my PPA ads per 800 or so impressions. You will make conversions, this method makes great use of the pure volume of visitors you receive.