Published in the Journal of Economic Perspectives, a report released earlier this year entitled "Red Light States: Who Buys Adult Entertainment" highlights where the revenues for pornographic entertainment on the internet actually come from. According to , internet sales are the second largest piece of the $12.6 billion adult entertainment industry, drawing $2.84 billion in 2006.One of the most interesting findings in the study is American subscription patterns that utilized a list of zip codes

Source: Red Light States: Who Buys Adult Entertainment, By Benjamin Edelman ; FCC Report: High Speed Services for Internet Access