Last week was not a good one for the imaginary farm/mafia/faux-Scrabble™ merchants at Zynga. After their much ballyhooed CFO Dave Wehner jumped ship for Facebook, its Treasurer, Mike Gupta, decided that he'd found greener pastures at Twitter: Zynga Inc. (ZNGA) Treasurer Mike Gupta is departing to take a similar role at Twitter Inc. as the largest […]