Click the above and see whether you qualify or not. Add 50$ or more in amazon cart and partially pay using American Express reward points ( I paid $1 using points.) once you do that, your order total will be reduced by $25. More details in the url above.
The promotion will end at 11:59 PT on 12/31/2017, or until 80,000 customers have redeemed this offer, whichever is earlier.