Amazon, Today Only: Save $10.00 when you spend $100.00 with your MasterCard, plus get an additional $10.00 discount on future purchase

Today Only: When you spend $100.00 on Amazon and use your MasterCard you will save $10.00 plus you receive an additional $10.00 on future purchase. Look for the above logo on your Amazon home page. I should have waited until today to do my Christmas Shopping.