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Gambling is good business, or at least a profitable one. According to the American Gaming Association, in 2012 the 464 commercial casinos in the US served 76.1 million patrons and grossed $US37.34 billion.

Each year gaming revenues in the US yield more profits than the theatrical movie industry ($US10.9 billion) and the recorded music industry ($US7 billion) combined. Even the $US22.5 billion combined revenue of the four major US sports leagues is dwarfed by earnings from the commercial casinos industry.

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Source: Losses disguised as wins, the science behind casino profits I The Conversation