Shares of Zynga (NASDAQ:ZNGA) are up by a surprising 10% on news that the company not only beat estimates for the quarter, it also made a profit. In this video, however, Motley Fool tech and telecom analyst Andrew Tonner tells us why he doesn't see the business as a sustainable one in the long term. He also tells us some of the brutal trends that make it very hard for Zynga to hit profitability consistently.

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