It's obvious, that the more people play on a specific Slot, the more your wining increases and the jackpots in the same time. There isn't any kind of rule when playing at reel slots. Each player makes his / her own rules; one important thing you should keep in mind is that you cannot count on your past experiences for the particular pulls / spins applied. This way, it's better if you try every machine and while playing you will notice how the machine works and you can repeat your own pull-rule. When introducing your coins into the machine, you can see on particular window that there is displayed the number of coins which are in and another window which is for coins out. Approximately you can calculate whether you will benefit of a great winning or not. If you divide the number of coins out by the number of coins in, then multiply this result by 100 and it varies around 96 or higher than this, it is almost clear that you will loose.