I am against rake back also, but to answer one of your questions. If you are going to use the rake back model and you care at all about your players, you should educate them about the values of bonuses and rake back and the difference. Educate them that unless they play 40+ hours a week at 5/10 or higher they would probably be ahead to chase bonuses than play for rake back. Then give them a list of rooms to clear bonuses at. This may build value to your site and hopefully your customers will come back to your list and sign up through your links. There is very little loyalty and if you give your visitors solid honest information you will have a chance to succeed.