The problem is that you can't arbitrarily add 10% to everything. If ioi had access to the numbers to estimate a game's online sales and track them to find overall trends, I'm sure he would. The problem is that no one is releasing numbers for online sales, at least not as far as I've seen.
To estimate Live numbers, Stickball had to create an ingenious system of cross-referencing player numbers and extracting sales trends from it. Not an easy thing to do and it only works if you can find a way to correlate the two.

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