Currently, 11 million customers participate in Bank of America’s Preferred Rewards program. Membership provides benefits and price discounts. A checking account is required to join Preferred Rewards, and most customers also have credit card and/or investment accounts with BofA. Many of those Preferred Rewards customers also participate in BofA’s BankAmeriDeals program, which offers credit and debit card customers cash back, coupons and discounts from merchant partners. BofA expects to more than double the overall number of loyalty program participants when it launches BofA Rewards in...