LEAWOOD, Kan., Jul 21, 2010—epay, a division of Euronet Worldwide, Inc. and a leading prepaid and payments processor in the U.S., today announced its integration with Radiant Systems to offer its prepaid and payments program through the Radiant Point of Sale for Petroleum and Convenience Retail. The Spinx Company headquartered in Greenville, South Carolina was the first retailer to transact on this newly integrated platform....