fxa5209 on 19 November 2009
I never knew this. However, I dont understand how VGCHARTZ was even able to figure out the increase in Xbox sales during the 100$ promotion period. The promotion was only for the two untracked retailers by NPD.
I can tell you that Amazon would make a big difference for PS3 since PS3 has been in top 20 since the launch of PS3 slim. While Xbox was not even in top 50 on Amazon except for the week of the 100$ promotion. It will be interesting to see the NPD for November, I believe it will be way off Vgchartz numbers.
