FBI, Justice Department Investigating Daily Fantasy Sports Business Model - WSJ

Tangentially, see The accidental godfather of fantasy sports (Boston Globe)

"The probe is in the preliminary stage, two people said. It is part of an ongoing discussion within the Justice Department about the legality of daily fantasy sites, in which customers pay entry fees to draft virtual sports teams that compete against each other for prize money based on the real-world performances of athletes. Congress in 2006 prohibited financial companies from transferring money to online gambling sites and several were shut down. But so-called games of skill were exempted. Fantasy-sports sites have since operated under that exemption. So-called daily fantasy sites like DraftKings and FanDuel, Inc. didn’t become popular until after the law was enacted."

FBI, Justice Department Investigating Daily Fantasy Sports Business Model - WSJ