Leawood-based Front Flip LLC has been sold to digital marketing firm in Austin. Heavily invested in the mobile entertainment and gaming space, Shoutz Inc. acquired Front Flip with a particular demographic in mind. "Front Flip was a very strategic acquisition for Shoutz," COO Frank Rash said. "It reaches core Millennial customers that are core both to Front Flip and its retail customers but also it's a lusted after audience for gaming and some of the other things we do with our products." Front…