Coincidence that you post this today because I had an argument with our Pinnacle Affiliate manager an hour ago about the same thing. Our players have deposited more than 40K in 2011, yet we made US$ 800.
The answer was predictable enough: “You don’t earn commission on deposits”
On top of that they did not disclose the amount of withdrawals made by our players. This is a number that I’d like to have to see if revenue numbers can add up at all.
They are good for players but I am having a real hard time recommending them to affiliates nowadays. Better to stay away if you need the cashflow. If you are already making a fortune, you can keep them to give your users/players a great bookmaker.