I just got a call from WDW about the concern I wrote to them about not getting the discount at DD when I used my AMEX card this past Jan. They said that I indeed was correct that if I used my AMEX card at check-in to cover room charges that I do get the discount. She is calling the head of DD and informing him that their mamagers are refusing some of the DVC guests when they ask for the discount. If you buy over $50 in murchandise at some DD stores and use your AMEX card and show your room key card you are to get a 15% discount. Check the AMEX booklet that you get when you check-in to find out which stores give the discount.