I guess if your traffic is small it's no problem tho. But once you get good traffic (and wtf kind of business model do you have if you aren't planning for massive traffic?) you'll find that it's harder to keep your ad server up and then storing lots of logs is a pain in the ass.
The data part does not worry me as much as the security
My open X has been hacked.
I do really appreciate all the input .
I have been messing with the google one a bit today.