Ted Pollak, JPR Senior Analyst Game Industry, is forecasting that in the coming years, virtual items (ie. WoW gold) will be one of the biggest sectors of economic growth within the games industry, accounting for "billions" of dollars.
Its the same thing microsoft does with Downloadable content. These mmorpgs have a huge grind factor, and people see they can pay twenty bucks and get some in game cash that would take me two months to earn. Huge untapped market there for a franchise to make full-time jobs out of.
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