As a Gold, and now as a Plat, I have always received free breakfast at this property. There has never been a coupon involved - instead they present a normal bill, you charge it to your room, but the charges never appear on the folio at checkout. Technically, you are not supposed to take the hot items from the buffet, except oatmeal and grits.
Edited to add: It's a great property and I highly recommend it. Best staff I've ever encountered...