03/16/2012 12:51 pm ET

For Apple, Pressure Builds Over App Store Fraud

In a little over an hour, Ryan Matthew Pierson racked up $437.71 in iTunes charges for virtual currency that he could use to buy guns, nightclubs and cars in iMobsters, a popular iPhone game. One problem: Mr. Pierson, a technology writer in Texas, has never played iMobsters.

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