While travel is among the foremost industries when it comes to loyalty programs, the perception of these initiatives is often tied to the earn-and-burn model of airlines. Lesser known within the travel vertical are cruise line programs, which forgo this kind of currency turnover in favor of a tiered approach. Guests aren’t required to spend points in order to earn rewards, but rather keep these “points” in the form of a status tier, with each level offering unique benefits given either once or on each subsequent cruise....