Playstation 4 has sold-through 30.2 million units worldwide

[CosmicSex]

4k1x3r said:

Protendo said:
How is the PS4 under tracked so often. All the adjustments and it still ends up this far behind.

Because it sells more in places that are harder to track. As simple as that.

I think that might be the key.  Well, they should compensate for their own gray area as a percentage of what they can track.  Thats what I would do anyway.