AMEX OFFER: spend $15, get $5 back, on-line only, expires 11/30/18
T&C does NOT exclude gift cards, and gift cards have worked in the past.
Big downgrade from the $15 cashback they've offered in the past. My Amex CC only gives me 1x points for Sam's Club, with is about 0.5% cashback - that's only $1 for a $200 gc, not worth the trouble to liquidate. Since I plan to stop a SC for the 5% Discover and Chase, I may use the Amex offer to buy actual groceries with in-store pickup, or a 3rd-party gc that I'll use in organic spend.