They've already defined what a subscriber is in the press release, and it seems to indicate to me that the snapshot of total users only includes those that can play the game or have played the game in the last 30 days.
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Re: WoW pre-exp launch: 8M worldwide, 2M in the US
They've already defined what a subscriber is in the press release, and it seems to indicate to me that the snapshot of total users only includes those that can play the game or have played the game in the last 30 days.