Helping digital merchants gain new customers is the business of Boku, which connects to 170 mobile network operators (MNOs) in 49 countries. Boku offers digital merchants the ability to sell content that can be paid for through 3.2 billion prepaid or postpaid accounts at MNOs. Over the next 12 months, Boku will handle at least $2.30 billion in purchase volume. The company began as a payment method for companies offering games on Facebook. It has expanded to include customers such as Apple, Google, Microsoft, Spotify, and Sony. Among independent carrier billing companies, which include Fo...