Let's pretend to talk business for a moment. DVD sales made up only 30 percent of porn publisher Vivid's revenues last year. That's down from around 80 percent, Vivid cofounder Steven Hirsch told the Sydney Morning Herald. He blames the YouTubes of the porn world, free sites offering low-res video. It's a tragedy. It's a shame. You likely don't care.

Free porn sites destroying old-school pornS

As the chart shows, three of the top threats to the old-school Internet porn world are XTube, AEBN, and YouPorn. According to the Sydney Morning Herald, XTube earns "millions" from DVD and streaming video sales. AEBN, despite its lower traffic numbers, annually pulls in around a hundred million dollars from advertising. YouPorn, which faces a copyright infringement suit from Vivid, earns about $120,000 in revenues per month, according to Portfolio.