Channard continues, "The key difference between buying titles on the 360's Marketplace and Sony's PlayStation Store is that buying a title from the Marketplace only usually entitles you to play that title on a single console. A PlayStation Network account, on the other hand, can be used to license up to five consoles, meaning any title purchased from that account can be played on five different consoles. And these consoles can be de-authorized and re-authorized at will, allowing gamers to switch licenses around. This has led to a practice known as PSN game sharing, whereby gamers can purchase a title together, thereby paying a fifth of the cost of the game, and still allowing anyone to play the game on their console. Whether this has had any direct impact upon Sony or Capcom's apparent decision to implement this forced sign-in system is unknown. [Though an email from a Capcom employee seems to confirm this.] But Final Fight is the first title to feature this system — it'd be interesting to know whether this was done at Sony or Capcom's request."