What's this? Fruit Machines ripping us off?!? NO Never. I only found this out oh, er, 20 years ago.
It tells you on the front of EVERY machine that you are going to lose. Even in an ideal world, where all's fair in love and war, Fruit machines will take more money than they pay out. It tells you this near the slot that you put your coins in!
Who honestly cares how they do it? We all know that they do.
Easy
Using the EMU for what is was meant for - pleasure