Quoted from jackofdiamonds:You had to buy a board to get them to behave they way you want!
He bought a board to retrofit games that weren't designed for them, but the argument in this case is that LEDs suck. If the game is designed to drive them properly, they can look great. If the game accounts for them, it doesn't really even cost anything more. The driver circuits can be cheaper than incandescent since they don't have to supply as much current.