I know everyone wants to know how many units it sold. (me too) But to discount all revenue sources, specifically microtransactions, comes off as short sighted.
Wasn't there a post recently where EA stated that it makes more money off DLC for their games, than the actual games sales numbers.
Microtransactions, and DLC will start to become a more relevant number to the overall sales of a game, as these also tend to help give a game legs.
Also, Didn't the Taken King kill it digitally on the Sony storefront? Also explains it's lower than expected NPD numbers.