As a cash-intensive business, an illegal bookie may encourage customers to skirt reporting requirements without offering any protections. In comparison to legal gambling, illegal bookies don't follow the rules. Illegal gambling tends to be tied to other offenses, like money laundering. Illegal gambling establishments are a different ballgame. Legitimate gambling establishments typically work to ensure proper reporting because illicit cash can otherwise be a threat to their financial systems. That’s true on all levels from office pools to online betting platforms to casinos. Gambling necessarily means that large amounts of cash are moving around.