As you are probally aware one large enity owns and operates several of the cruise lines. I have these past cruise memberships in several and have found that not one of the crusie lines will honor any of the benefits that are given by other crusie lines, even when the cruise ship is under the "overall banner" of one owner. I talked with one of the officers on the last Holland America crusie and he told me that each crusie line while operating under general policies of the home office still get to set their own criteria. For example one crusie line offers a hugh discount on thier internet services while a sister cruise line does not offer any discount regardless of the number of nights or cruises you have taken.