They do. They just don&#x27;t sell the emulators free-standing; they tie them to specific games.<p>This gives them a lot of options; it lets them assure quality by making sure the emulator works perfectly on that game for the given platform, it lets them do very targeted optimizations, and it makes sure that you have to buy the next game from them as well since you usually can&#x27;t just take the image out and pop a new one in.