The one I remember is the learning curse. Getting to a certain level is can be easy, then there's a long, mostly flat (and coin eating) plateau before you start advancing again.
Probably a similar design in slot machines.
. Not too long ago there was a man who took Pac-Man to the end of the program.
At a certain point, half of the screen goes blank so you cannot advance further.
So you can in theory "beat" Pac-Man, or at least call it a draw.