superchunk on 06 January 2012
All he needs to share is revenue earned from sales, not the specific units. Nintendo does this as they may come out lower in unit sales due to none of promotions, sales, etc that MS/Sony due, however, the same game may have higher revenue and margins since the prices remain steady.
Kinda the same reason iOS has a higher earning potential than Android when it comes to apps. iOS forces higher unit prices whereas Android tends to push developers into free ad-based transactions.
