The entire high finance industry exists with the same sorts of stipulations. You can still trade stocks, but many company's prohibit you to trade your own company's stock actively, and the rules 100% block the trading of anything if you have material non-public information which could influence the price of a company. It's the same idea. As a member of a franchise you are the owner of MNPI, and as such you are barred from better on the outcomes connected to that information. It isn't that hard or crazy. Don't bet your team, don't bet baseball. If you bet something else, do it publicly and clearly.