Amex offer question. What happens if you redeem an offer, but then return the item that got you money back? Will Amex just adjust the return amount minus the offer money back?
Not trying to game the system or upset Amex. I just saw these new Mickey Ray-Bans and I have a shopping problem and want them.

I have a $30 off $150 Sunglass Hut offer and figure I would buy them once they're online in the event they sell out. I am ALSO going to the park at the end of the month and figure if I can get them 20% off with my AP and use discounted gift cards it would be a better deal and I would want to return the original pair to Sunglass Hut. I am torn