link 1: "Gambler has no right to contest non-payment because casino is on tribal land"

link 3: "there was "clearly a display malfunction" and that the machine's maximum payout was programmed for $6,500"

link 3: "the user-agreement, available on the touch screen, said the maximum payout was $10,000"

Why incomprehensible? Because you know (the latter 2) aren't really malfunctions?