There are games out there that we think are rubbish then we find somebody getting out the milking stool and emptying the game/ machine.
I saw a guy called Gareth (friend of Paddy Spooners)playing a barquest when it was on 50p/£1/£2 trails many years ago.He could make a fair bit of money slowly but surely.There was also a guy that would travel the country just playing Radio Times with a £5 jackpot.The fact that he knew every question helped.