With news of another pair of executives bolting from Zynga Monday, it seems time to start focusing on who’s filling those increasingly empty seats, rather than who’s left in them.

While chief technical officer Allan Leinwand and chief marketing and revenue officer Jeff Karp explore other pastures, the pressure is about tostart mounting on Maytal Ginzburg, who came on board at the end of last month to fill the chief operating officer position left vacant by John Schappert’s unceremonious departure from the company.

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