New York Post: Viacom is said to be losing its advertising sales boss at the worst possible moment for the company. Jeff Lucas is leaving to join Snapchat, one of the tech world’s hottest destinations, sources said. The exec, who took over ad sales for the media giant last year, is set to exit in July. Lucas is expected to be named chief operating officer of Snapchat. Variety: Other sources, however, have dismissed the report as speculation and said Lucas was entirely focused on Viacom’s upfront process.