"In 1994, visionary entrepreneur Gary Kremen used a $2,500 loan to create the first online dating service, Match.com. Only 5 percent of Americans were using the internet at the time, and even fewer were looking online for love. He quickly bought the Sex.com domain too, betting the combination of love and sex would help propel the internet into the mainstream. Imagine Kremen’s surprise when he learned that someone named Stephen Michael Cohen had...