I am on your same cruise, and got the same offer.. I spoke to two different reps and they both said I can use it for Grats, beverage pkgs, dining, gift shop, excursions etc.....But they both said we cannot use that OBC in Casino... Which was a bummer because we do gamble ALOT.... But that's ok, I'm sure we'll apply it towards grats and maybe towards our drinks, because we do not buy beverage packages.