It is unknown.
A lot.
as of January 2011 50 million
Yes.absolutely
Xboxs
Yes.
No
it should be made of xboxs
$200-$400 Depending on what type.
It is possible to sign into as many Xboxs as you want with one Netflix account.
Yes.
No.
You can play the game on Xboxs, PCs, and Playstations.