Some online sports books used to operate betting markets where you&#x27;d essentially buy options on teams, with the price of the option being determined by the demand. The house would make money on the spread.<p>The fundamental difference between why that&#x27;s illegal and betting on daily fantasy football is not, is simply that the anti-online gambling laws of the U.S. specifically allowed for betting on fantasy football and outlawed other types of gambling. When that law came about, I believe in 2007, daily fantasy football either didn&#x27;t exist or was extremely niche. It really took a few years before big players like Draft Kings and Fan Duel got substantial traffic. When the law came about, there were a lot of small players who came and went.