Thats because the old software tracking ended and will never return. There have been multiple posts and topics about that.
We switched to reporting official shipment numbers.
Announcement thread is here - http://gamrconnect.vgchartz.com/thread.php?id=238631
New front page details here - http://gamrconnect.vgchartz.com/thread.php?id=239684
Which means if they announce sales for individual titles we will list them, and we'll post any official charts or revenue totals that are produced for them, but we won't be estimating software sales ourselves.