I read over the reasoning behind the change, and I have to say that it’s pretty bogus. If your goal is to encourage inactive affiliates to become more active, incentives for new player signups is going to be a lot more effective than punishing people by paying them lower percentages if they don’t send new sign-ups.
And as Spear said, you need to live up to the terms of your original agreement.
I haven’t marketed Referback yet, but this change in policy hasn’t motivated me to send them any players or sign up with them in the least.