A lot of gambling is a scam executed form profit. I call it a scam because it's not always fraudulent, it's persuasion and a dash of misleading info. Often one party unduly influences the outcome or has information that the other can't have. Whether it's corruption to predetermine the result of a match, or knowing that the star player will miss it, or a gambling machine that suggests a higher expected payout than the real one, or even a casino's rules that arbitrarily decide whether your win was legitimate or not, in practice the industry is more scam than legitimate business.