Jeff Smith, chief executive officer of Starboard Value LP, speaks during a Bloomberg Television interview in New York, U.S.Starboard Value has amassed a roughly 6.5% stake in online dating company Match Group and is pushing the company to either make changes that would improve margins or go private.Starboard's Jeff Smith wrote, in a letter on Monday to Match CEO Bernard Kim and its board, that cost cuts and product innovation could drive revenue growth at the company. Smith has been speaking with Match mana ...