Looking at my current online offers (CET), I see I have one for "$10 food and beverage credit" and one for "$20 resort credit". Exactly what does a "resort credit" entail? Can I use it on F&B? Also, these are offer codes that you are supposed to use when you book the room. Since I have already booked, can I email my host and ask her to add one/both of these to my reservation?