Yes most, if not all, direct buys. Otherwise I wouldn't even consider going to an ad network.Call mate. Additionally, do you even have media buying experience?
this could be one of the best incentives to run with a CPA network, everIf anyone needs help with this please let me know we have relationships with many many traffic sources, way more then we can buy on ourselves, and are always happy to hook up our publishers. Can help you strategies and what not as well.
As with most things in life it has a language. They also have a good feeling by how you present yourself.