Tiene que tratarse de un error (bueno, de varios errores); sin embargo, la web parece seria.
De hecho, clicando en "About Us" podemos leer lo siguiente:
About VGChartz
Founded in 2005 by Brett Walton, VGChartz (Video Game Charts) is a business intelligence and research firm and publisher of the VGChartz.com websites. As an industry research firm, VGChartz publishes over 7,000 unique estimates per week relating to worldwide game hardware and software sales and hosts an ever-expanding game database with over 40,000 titles listed and 1.5 million unique data points. The VGChartz.com website provides consumers with a range of content from news and features to reviews to social networking and community features.