Put in $25, Get $10,000 Back. Your Bank Becomes a Casino

With interest rates barely above zero, the typical U.S. savings account has all the excitement of, well, waiting in line at the bank. But what if instead of marketing yet another CD or credit card, banks held raffles and gave millions away each month to savers? The local bank might feel less like the villain behind those big overdraft fees and more like a casino on the Vegas strip.

A bank in South Africa tried this in 2005. The First National Bank's Million-a-Month Account promised savers a chance to win 113 prizes a month, including a grand prize of 1 million South African rand (about U.S.$150,000 at the time). Within 18 months, the bank had more prize-eligible accounts than regular ones. These new customers, many of them poor, saved an extra 1 percent of their incomes, a recent study found, and boosted their overall saving 38 percent.