If you didn't get the bonus when you traded the stuff in (because you thought the games weren't eligible and subsequently didn't put them toward a qualifying title), I don't think there's any chance you'll get the bonus after the fact. Trades are final, from all my experiences.
Yeah, I mean, the only reason I thought it might be something that would work would be the fact that GS really wants people to lock in pre-orders, so they might "fudge" the rules on that in order to get the pre-order.
Anyway, I have a different question now! I called that store just to see and the guy said that you have to apply all of the credit towards the eligible pre-order games. I explained that just tonight I had applied 5 bucks towards a game and received the full extra 40% bonus (plus 10% for PUR) on my order. He then said that I did not actually do that, and I said, "well OK, it doesn't matter then" and then he said that their store manager has a policy that all the credit has to go toward the games you are pre-ordering.
So... my question is which is correct? This -- to me -- sounds like a case of a store clerk going rambo and making up rules to "protect his store" -- can a store manager do that?