Tesla Inc. (NASDAQ:TSLA) and SpaceX CEO Elon Musk on Wednesday made a surprising appearance at the Cannes Lions conference in France. The tech billionaire used the platform to address his previous outbursts and reassure advertisers about the platform’s future. What Happened: Musk, the world’s wealthiest individual has had a tumultuous relationship with the advertising industry. He was interviewed by Mark Read, CEO of WPP Plc, one of the largest advertising agencies, at the Cannes Lions International Festival of Creativity, reported Bloomberg. Read began by addressing Musk’s previous criticism …