Hello Heather,
I can tell you that before taking any decision, I would really like you to go to http://www.gamblingwages.com/revenue.asp and check out all of the options.
To be honest, most of our affiliates work on Revenue Share, however you may consider something else. It all depends of the type of players you send to us. So far I have not seen any of your players winning big, so you shall not be afraid of Revenue Share. In CPA deal you will need to make sure all of your players qualify, i.e. deposit and play the CPA amount. For example, in order to get paid $60 commission per one player, you have to make sure this player deposits at least $60.
Please let me know, if you have any further questions! 
Best regards,
Natalie Stewart.