That reminds me... Ever wonder why old arcade games limited your continues? I abandoned Haunted Castle (Castlevania Arcade) because of that crap. I mean, you're paying to play, so why make you restart if you pay too much?
It makes sense on a console game, as it helps to stop you completing the game on your first sitting, but I thought the idea of a coin-op was to make money for the vendor by making the player keep sticking money in. I got caught by a Final Fight machine once, I spent a fortune getting to the end only to find that the machine was set to not let you continue at the final boss! AAAAAARRRRRRGGGGGHHH!!!