(Source: Market Watch) Call it drone-vertising. Drones have already been used for delivering packages, serving as waiters and photographing sporting events. The next wave of uses for drones? Flying billboards. “People are fascinated with the concept,” said Eugene Stark, founder of Hoovy, a company that hangs banners from three to six foot wide drones and flies them … [Read more...] about Drones Are Turning Into Flying Billboards