^ I'd imagine the easiest method would be to give out paper vouchers at check in (although not sure how that will work with their push into mobile checkin and keyless entry), but even with that, unless they are expecting a drastic decrease in the number of guests getting the free breakfast, I don't see how the staff would be able to police it. As it is, my experience with HP is that the staff have trouble keeping up with just having clean plates, glasses and flatware stocked.