My corporate rate includes breakfast at FS Marriotts but not at Courtyards so I'm double eligible for breakfast at FS, not eligible at all at CY's.
One funny thing was when at one FS Marriott they insisted I have to eat the breakfast in lounge. It took a lot of explaining before they understood that my rate including breakfast in the restaurant can't be downgraded to breakfast in lounge just because I happen to be Platinum.