I tried this only ONCE and succeeded right away... This method will NEVER get saturated , it's a guarantee!
Ok, so basically you signup for the CPA network, usually they ask the way you will promote, you will say PPC Advertising (Google ADWords, etc).
So once you signed up, CALL THEM and tell them that you need to start promoting their CPA offers urgently, they will ask you usual questions such as "how will you promote, explain etc" , you will just have to say you are going to promote through Google ADWords and other PPC networks. If you don't know what PPC is, make sure you know first!
And tell him you would really appreciate it if he could review your submission right now, since you have to start A.S.A.P.
Calling them will make them think you are interested, and not some random guy submitting to join the CPA network.