Look at the typical consumer's email inbox, and you’re likely to see an inundation of messages from different loyalty programs, all clamoring for attention. This isn’t happenstance. American households today belong to an average of 16.6 loyalty memberships1 Hotel chains, restaurants, and other retailers are all trying to build loyalty with customers. In fact, the market size for global loyalty management was valued at $4.54 billion in 2021—and is only....