Starbucks customers in the U.S. and Canada are splashing less cash at the coffee chain than ever before. That doesn't mean that they are buying fewer beverages and snacks. Rather, they are embracing the company's loyalty card (which can be loaded with money) and app. The company has 12 million loyalty members in the U.S. alone and that means that Starbucks boasts a serious amount of cash on its customer cards. Wall Street Journal data featured in Market Watch shows that Starbucks has more customer cash than many banks have in deposits.