This Forbes article certainly suggests so. Zynga's valuation is between $4-6 billion (that's almost approaching Electronic Arts- ERTS), Valve's is between $2-4 billion and Gabe owns more than half the shares. Unless I missed someone, these two are probably going to be the first billionaires through video games. It is kind of ironic now how their products (Steam, Farmville) were largely dismissed by players on launch.
Mark Pincus & Gabe Newell: Gaming's first billionaires ?
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