As long as there's a business permit for gambling, you can be let off the hook for gambling operation but there's still fortune to make even if you're on the illegal business, there's a lot of illegal gambling houses in my country but there's not a lot of them that gets caught as they are a syndicate and they tend to be operate like an open secret, you can't snitch on them as they'll going to put you on a hit for as low as 100 USD.