While I was checking out the Amazon Gold Box deal I noticed a promotion offering $10 off a $100 purchase at Amazon when you use your MasterCard.
A 10% discount is a good deal if you happen to have a MasterCard. You could use the discount to grab items that are not usually on sale – think Apple products and readers!! Just use the code ZKGYLEBT at checkout!
Here is the fine print:
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.