I personally do not play slots, but do you think that is why people like slot machines? Short of breaking their code?
At the same time, people think on slots like you have to feed it in order to get something from it. i.e. I know people who lose and look positively at it because they think that slots need to eat money in order to return some to you. Then they lose money and say offensive words like are you still hungry you mf... give me some money back.
I haven't heard anyone trying to break the code but some people really think that there should be some secret sombinations that will hack the slot machine and they'll become millionaires.
Its complete random and the user can only expect that lucky draw and they expect it all the time, thats the hook of gambling that is why people keep falling for it even if they know they never going to make it happen.