You are right, sorry my explication was a bit too much succinct.
Casino have rule and regulation enforced by government. Same goes with slot machine in bar after the news reported rigged machine in my country.
By rigged I mean, the income vs reward ratio was tricked on that machine and after a long time not used they reward more. So yeah it’s not a person but the machine itself that have a timer on it.
Still there is a income vs reward ratio on those machine, so the money they give is a portion of the money they get. So yeah after a big gain you better go to another machine. The casino is there to make money not making rich people, it’s an entertainment.