Link: http://iway.org/g.php?id=8937911
Amazon.com customers get a $10 discount off your order on MasterCard
Savings
Days when you use your MasterCard® card to purchase $100 or more on
products sold by Amazon.com. Customers who complete their qualifying
purchase on Savings Days will receive an additional $10 discount to use
towards a future purchase when you use your MasterCard® card to
purchase another $50 worth of products sold by Amazon.com. See Terms &
Conditions.