Let's see, I guess I'd say: "I'm sorry that I traded in games after being enthusiastically encouraged to do so by your employees and then went over an undisclosed and arbitrary trigger point. I will never do it again even though I don't know what it is that I am not supposed to do". I guess it is worth a shot .
Exactly! Just say it with confidence, and you're set. Plus mention you're a silver rz member too if you are. Nothing to lose man.