I think that the main advantage of slot machines is the independence of the player both from partners and from the dealer. Slots are played alone. Fei took care of it. He owns a patented automatic mechanism for receiving and issuing coins. Now a person could just walk into a bar, drop a nickel, pull the handle and win ten times as much - that was the jackpot in the first slot - 50 cents, not bad money in those days.
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