You'd think that some people will learn
1st: Mediatraffic is not an official source and doesn't TRACK sales, it ESTIMATES sales.
2nd: ATRL members are ot more reliable than IFPI's
SALES reports.
By your logic BTW didn't sell anything during the whole Born This Way Ball that had 19k average attendance per show
It sold 6.2/6.5M in 2011 alone. Then in January alone it sold 300k in the USA ALONE. It sold 300k more in Japan during 2012 ...
It's not that hard, really.