After looking quickly the "Discover Amanyara" (Not to be confused with Season of Discovery which includes full board) package with the 3rd night comp doesn't apply to Ocean Cove and above. The standard daily rate doesn't include breakfast, but just book through virtuoso or FHR and it will be included. They will let you stack "Discover Amanyara" package with them as well to get upgrade, FB credit, ect.
AmEx FHR can't book the Discover Amanyara. Their rates are the Standard rate. Not sure about Virtuoso.