Well...Dark Souls doesn't, but Jim does while using Dark Souls/FROM as an example. Anyway, it's Dark Souls related and I found it interesting, so here's a link to a video I saw:
http://www.escapistmagazine.com/videos/view/jimquisition/7121-Dark-Souls-and-Dark-Sales
http://www.escapistmagazine.com/videos/view/jimquisition/7121-Dark-Souls-and-Dark-Sales