Re: They used to work
"For machines with more "expensive" looking prizes, it should really be obvious that the pay-out rate will be lower than 1 in (cost of prize) / (cost of go)."
There is (was?) one of those grabber things in the corridor just outside the entrance to the Gents (and on the way to the Ladies) at Wetherby Services that had Mobile phones and handheld console games (Nintendo?). I never saw anyone try it. Ok, I was only ever in there a couple of times a week for 5 mins, but usually happened to be calling in on my past about during the lunch rush. I dread to think what the odds settings must be for a "win" on that machine!