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I'd like to hear other people's estimates for GW2 sales in the 1st month and 1st year. Here is my guess:
1st Month: 5 Million Copies (includes pre-purchases)
1st Year: 15 Million Copies
These might seem a little overly optimistic, but I'm betting that word of mouth will play a big role shortly after release. Either way, I think it's fun to discuss.