The 50 largest issuers of Visa, Mastercard, and Discover brand general purpose prepaid cards in the U.S. accounted for $145.03 billion in purchase volume at merchants in 2015, an increase of 13.0% over 2014. Spending was tied to 4.25 billion purchase transactions, an increase of 12.3% from the prior year. Purchases averaged $34 per transaction and $522 per card. Cash withdrawals at ATMs or obtained over the counter at financial institutions are not included in purchase volume shown in the table here. There were 278.0 million Visa, Mastercard, and Discover branded prepaid cards in circulatio...