I find it interesting. It makes me wonder about other sales of games. Take TW2 for example. How many collector's editions did it sell? How about the regular premium edition? If it would have been a box with only a disc and a digital distributor's code (that shall not be named here) would people still have bought it? Or would they have waited until it was on sale for what they valued it at, say $10, either at retail or at a digital store?
There's all these variables to sales figures that people don't give when they shout about sales. It's really none of my business either but since sales are used as an excuse for so many things that annoy the everliving shit out of me, I WANT TO KNOW DAMNIT! :)