Sorry for all the multiple posts, new posts keep popping up as soon as I reply ;)
I believe what VGcharts.org is trying to do is similar to what you describe Workwork, they take numbers from NPD USA and take that into consideration for their numbers. However the thing is the numbers we look at are meant to represent North America as a whole and probably include numbers from NPD Canada and whatever numbers they can get from Mexico, if that even is a signifigant market.
So why don't they just put up NPD numbers, maybe just broken down by country? NPD would not allow another site to publish their complete charts verbatim. It's their business to sell that information to others.
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I believe what VGcharts.org is trying to do is similar to what you describe Workwork, they take numbers from NPD USA and take that into consideration for their numbers. However the thing is the numbers we look at are meant to represent North America as a whole and probably include numbers from NPD Canada and whatever numbers they can get from Mexico, if that even is a signifigant market.
So why don't they just put up NPD numbers, maybe just broken down by country? NPD would not allow another site to publish their complete charts verbatim. It's their business to sell that information to others.