Two or three of these Bitcoin advert sites have popped up in the last couple of weeks. It's going to be pretty tough to make it work if people are spread over multiple networks. Good luck to you anyway.
sexybitcoinads is still vaporware. throughads has 0 campaigns. bitcoinadvertisers has over 100 publishers and 50 ads and works instantly, no need to sign up for an account.
It's going to be hard to compete with free - plus each of those girls get like 18,000 views on their pictures you won't be able to compete with that ...
Your network is one of many who have come and gone!