I noticed that quite a few new games come with a long code that you have to input to access online multiplayer. Let's take LBP Karting for example. You have to input a serial number, then download a "purchase" of $0 from the PS Store to access online play.
Now, our PS3 is shared between three different users. If one user inputs the code, is the code used up or can it be used more than once? Can the other users not access the online modes then? Do we actually have to purchase more online passes? Also, how expensive are these passes?
Apologies if this has been answered before. I can't seem to find much on this and I don't know the exact name for these things.