I purchased both the PS3 and the PC version of the game but have been only playing on PS3 due to my PC still being in transit to where I currently reside. Once my PC gets here I'm planning on switching to playing primarily on it while leaving the PS3 version to my little brother. However, I noticed that I can't change the username on the log in screen for the PS3. This is my first foray into subscription based MMORPGs so I am not sure how it works. Does the copy of the game bind to the account? Will I have to purchase a third copy of the game?