Based on what Saks has filed with the court, gift cards will be fine and usable with no impact. But I would use up the Amex benefit ASAP if you haven't already for H1. The schedule of contracts they look to reject thru the process includes one with "American Express Travel Related Services Company, Inc. ("Amex")". Read into that what you will.
Also I think inventory will probably restock now that vendors will have more confidence in that they will get paid with the new money coming in.