Another one of Richard and Nolan’s innovations. In most online games, you had to link your account to a credit card number to cover the monthly fees. Not so Chinese teen friendly. But since T’Rain had hard currency money plumbing built into its guts, this too was somewhat optional; if your character was turning a profit, for example, by selling gold, you could pay your monthly fee by having it deducted automatically from your character’s treasure chest. These were called self-sustaining accounts.