Give me a number.
I'm thinking 3 million with a gradual increase.
1 million - 1.9 million
2 million - 2.9 million
3.0 - 3.9 million
4 to 4.9 million
There is no subscription, you should be asking about box sales or monthly login activity.
ummm... are you talking box sales? Since GW2 is not p2p (afaik) there is no real way to do 'active sub numbers' unless Anet talks about individal account logons in the past (whatever) time period.
Closing this. There are no subscriptions for the game as others have said so we can't guess how many there will be.