3rd parties used to make shovelware on Wii that makes loads to finance their "blockbusters" on the PS3/360. Those games have a much greater chance of not breaking even. That model wasn't the best idea from the start, and is now made obvious due to the economic downturn.
They'd obviously start putting more effort into Wii games since it's much easier to profit, and would profit much more when it sells a lot.
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