How the sale of a Sting CD sparked an entire industry

On an August afternoon in 1994, 21-year-old Dan Kohn made history. Kohn had just sold a CD to a man in Philadelphia through his clunky website. The man paid $12.48 plus shipping for a copy of “Ten Summoner’s Tales” by the rock star Sting. Why was this such a big deal? That CD was the...