Calling the site crooked will not get you paid. Party Poker is probably one of the most honest affiliate programs in the gaming business. You mentioned that you promote Party Poker using the CPA method. There are a lot of scammers out there trying to cheat Party Poker by paying players to sign up and then collecting the difference Party Poker pays for the CPA. If the affiliate is paying the player 50 bucks to sign up and Party Poker pays the affiliate 75 bucks (CPA), they score an easy 25 bucks.
To help stop this, Party Poker is making sure the players who signed up generate enough rake to warrant paying out the CPA. Party Poker has a right to defend themselves and to ensure all sign ups are not fraudulent. Have a little patience and you will get paid. I am sure Satya will say the same thing.