How - To get the list of characters for a realm, first we record all the characters who posted to the auction house. Then we fetch and record their guild rosters. This should cover the majority of characters on a realm. To avoid getting listed, a character must never post to the auction house, and never belong to a guild where a guild member posts to the auction house.
So does that pop Rift/Starwars ahead of WoW for NA Subs?