Commissioner Roger Goodell’s appearance on CNBC touched on various topics. One topic in particular is one that the NFL typically tries to tap dance around.

The unprecedented growth of pro football over the last 20 years has resulted in large part from the ascension of fantasy football. With free agency potentially undermining fan rooting interest in specific teams, the ability to cobble together a team of their own has expanded fan interest far beyond the teams they love and the teams they hate.

For many, fantasy football has become another form of gambling. While plenty of folks play simply for bragging rights among friends, frenemies, coworkers, and other acquaintances, many make it even more interesting by putting something other than pride at stake.