This means that over time a slot machine will payback whatever percentage it has been set for, it has no idea how long you have been playing and whats more it doesn't care. The higher coin denomination the higher the payout. The percentage pay out does not vary all that much on higher end machines although it is true that nickle machines pay back less than quarter and dollar machines do. This practice will get you exactly nothing. This popular myth is just that.
Casinos control the payout from a central location.
There is such a thing as the Casino Gaming Board which prohibits Casinos from tinkering with their machines. Skeptics will continue to believe what best suits their mind set but this one ain't so. When a player does win on this tip it's almost impossible to persuade him that it was pure luck. Maintenance mechanics will reset your machine if it's winning to make sure it stops winning. Another strange idea held by some slot players.