This area is to discuss slot machines. A slot machine is defined as a machine that pays the customer something of value (coin, token, etc.) when a winning combination is hit.
Most people were expecting a 2 or 4 coin payout when the 3/5 came out. At first they called it a "mystery" why the machine was paying out 3/5. Maybe early on the reward cards were not changed and stilled showed 2/4. But I do believe the reward cards were changed when the mech was changed.