To my knowledge Party only takes away bonus amounts given to players. They do not charge the processing fees back to the affiliates ala
Full Tilt and
Cake. However, they do have it in their TOS that they will charge affiliates a portion of the transaction fees. They have never done this though, and I wish it was never in their TOS. As a matter of fact, this is exactly why
Full Tilt adopted this process in the first place. They patterned the structure of their affiliate program almost entirely on Partys system because they saw it as the best and most successful. They were always under the impression that Party always charged these fees, when in fact they didn't. I know this because this is exactly what their affiliate department said not long after they started.