As always with threads like this, part of the problem is people seeing VGChartz numbers as fact, when in reality the numbers presented on the site are nothing more than estimations.
People.
You are getting a fuckton of numbers on a worldwide basis... For free. The numbers will never have a 100% degree of accuracy and there will always be discrepancies with official data from Sony, Microsoft, Nintendo and whatever 3rd party publishers/ developers manage to release. The numbers will be different to NPD, ChartTrack and MediaCreate. The numbers should be taken for what they are, one companies estimates of the market.
Give this a read. It clears up a lot.
http://www.vgchartz.com/article/82746/editorial-why-it-is-so-easy-to-blame-vgchartz/
What VGChartz offers is timely data that isn't meant to be 100% accurate but be in the right range. We don't compete with the likes of NPD, GFK or ChartTrack; we offer a service that is totally different. One that is not based on comprehensive and direct retail tracking, but rather uses modern and alternative methods to quickly arrive at estimates, combined with a database of historical sales - constantly adjusted and tweaked to be as accurate as possible.
The key to success with the data on VGChartz (or in fact ANY piece of data) is understanding its nature and limitations. Too many people fail to understand that the vast majority of figures reported in the press are estimates of one kind or another.
However, even with the greatest of diligence, our data is still just an estimate so whenever quoting a figure from VGChartz it should be listed as an estimate and readers should be made aware that there is a margin of error associated. With this in mind, VGChartz data is fine for most applications - from a year-on-year genre analysis to first-day estimates for a major title to a ballpark estimate of total sales to date for a given game. It just requires the user to have a little common sense and realise that an estimate is not exact but better than having no information and intended to point you in the right direction. If we list the sales of a game at 600,000 then you know it hasn't sold 1 million and you know it hasn't sold few hundred thousand. It might not have sold exactly 600,000 but it should be around that range. It gives you more information than you had before but you must remember that it isn't an exact figure.
Maybe if websites, readers, retailers and major publishers got on board with VGChartz, dismissed the various political reasons they have not to support the site (which could form an editorial of its own) and understood the nature of the data and the insight it gives into the videogame industry to the extent that developers, investors and VGChartz readers seem to appreciate, then maybe the data could improve even further and that way everybody could benefit.
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