It probably does work out for them because of how famous they are. I want to play a Nintendo game; I have the options of either emulating or buying a console. I would probably emulate so I don't have to buy a whole new computer just to play Nintendo games. However if no emulators exist I'd be forced to buy a console. This wouldn't work out for smaller companies who don't have the kind of advertising and brand recognition of Nintendo, but I don't think Nintendo has issues with people knowing about and wanting to play their games.