What makes more money: sports or porn?

Via Sex at Dawn: How We Mate, Why We Stray, and What It Means for Modern Relationships:

Worldwide, pornography is reported to rake in anywhere from fifty-seven billion to a hundred billion dollars annually. In the United States, it generates more revenue than CBS, NBC, and ABC combined and more than all professional football, baseball, and basketball franchises. According to U.S. News and World Report, âAmericans spend more money at strip clubs than at Broadway, off-Broadway, regional and nonprofit theaters, the opera, the ballet and jazz and classical music performancesâcombined.â