Interestingly, Mark Pincus, who was Nguyen's co-founder in two of the 'pump-and-dump' schemes listed in the article (Freeloader and Support.com)[1], seems to be on an eerily similar path with Zynga.[2]
In hindsight, calling Freeloader and Support.com "pump-and-dump schemes" was not entirely fair of me, because both companies had real products and customers. If I could edit my comment, I would refer to them as "overhyped startups ultimately doomed to failure in which the founders cashed out before the collapse." That seems more fair.
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[1] http://en.wikipedia.org/wiki/Mark_Pincus
[2] http://www.forbes.com/sites/nathanvardi/2012/10/05/zynga-kee...