The stacker game with the moving blocks always frustrated me, I spent way too much money trying to win that one and got quite good at everything but the last round. I wonder if that one is rigged too.
Where I grew up there was two places next door to each other which both happened to have stackers. One had junky prizes like cheap earbuds, and the other had great prizes like a gameboy or mp3 player. Sure enough the later was more popular, but no one ever won. Once you got good at the game the one with the junk would 'allow' you to win pretty reliably every dozen or so attempts.