It only takes 8 million song downloads to earn a median middle-class income of $50,000 a year. Musicians (those signed to labels) who receive 20 cents from 80 downloads would need 20 million downloads annually to earn $50,000--roughly the median household income in the U.S.
http://charleshughsmith.blogspot.com/2014/10/the-artists-road-to-serfdom.html
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