I would happily subscribe to this site.
At the moment, the ads from adnxs.com are trying to use XSS (cross site scripting) which my browser is blocking and is potentially dangerous. Also the ads from mgid.com are somewhat suspect – “10 girls you need to see before you get married” and “Don’t fall off your chair when you see this pic” to name but several. Whether or not they are deemed suitable for the site is one thing, but I doubt they will bring in much revenue as I can’t see many people clicking them as they look so dodgy!
I have had lots of experience with adnxs.com before (mostly blocking it from corporate and government networks) as it is notoriously bad when it comes to security and has a somewhat chequered history to put it mildly.
If the site is costly to run, I would definitely encourage trying to move to a subscription model for extra features. I would be happy to help with hosting should the need arise. :)