The slots machines have constantly changed along history when talking about evolution. Nowadays they are controlled by computer chips and they return a fixed percentage commission for the casinos. This is also true for online slots machines as they have software that controls how much the casino is winning. In most situations the winnings of the casino are skim and the real problem stands in how players perceive slots machines. A lot think that the games are fixed, when in fact this is not actually true. The main benefit in playing slots is the added possibility of winning a very big bonus. In order to get the bonus you have to play and you will need to get over some preconceived online versus offline slots myths that exist. 
One of the myths that almost everyone believes happens when a person wins a jackpot right after a gambler leaves. The gambler ends up believing that if he/she would have played more the jackpot would have been won. This is not at all correct. Regular slots machines are controlled by a special computer chip, which is running RNG (Random Number Generator). RNG keeps cycling even when you do not play the machine. As soon as you spin the slots machine the chip (and in online casinos the software) is to offer the combination that was cycled in the microsecond when you pushed the spin button. Even if the gambler would have continued playing the possibility of spinning the slots at the exact same time as the one that won does not actually exist.
A lot of people think that by using a switch a casino can tighten or loosen a slot machine. This is not true because of the strict regulations that exist. In order to do this you would have to change the chip that is installed in the factory. Every chip change needs to be verified by a special commission. A casino cannot make changes as it wants. Also, machines that did not hit in a long time are not more likely to hit soon. Unfortunately there are still many gamblers that believe this myth and are looking to play machines that do not hit, hoping for a win.
The myths above are the most common ones but there are many others. Gamblers are known for their beliefs and weird approaches to gambling. There are some online and offline slots myths that might seem funny although many do think they are correct. For instance, some believe that the coin’s temperature will have an impact on the result of the spin. There are some people that even got burned while believing in this theory. Read also about the differences of online versus live poker.
What needs to be understood about online and offline slots machines is the fact that everything is really random. You can hit a lot of times in a row or lose a lot of times in a row. As was mentioned above, everything is controlled by either software or a computer chip. There is nothing that a gambler can do in order to change the result of the spin. All that you can do is keep playing and eventually you will win.