Wikileaks, though technically not a wiki, provides an easy means to disseminate information that some find it desirable to share against the wishes of those who find it desirable to keep secret. Aside from the morality of the leaking itself, such a service provides a look into the activities of...
Director's Cuts, How To guides, Rocksmiths... the world of downloads are full of things you'd never consider a game.... Wait a second... what the hell is an Enslaved? Eh, screw it, let's just play Beer Pong!
If you do your spring cleaning in winter, guess what you don't have to do come Spring? Nintendo is using the same idealogy to obtain faster than normal rates of selling-all-the-downloads.