It's all about marketing dollars.
Because whenever a new one comes out, fans buy them. Generally en masse.
Which raises a question here with us?
Why did the Pittsburgh Steelers choose this (see photo)? It looks like a throwback version of the SNL Killer Bess sketch. And the photo appears to have been taken in the shower.
C'mon guys. We have nothing against the Steelers, but we really don't get this. Though we guess maybe the rhetorical question should probably be posed to the marketing geniuses at NFL Properties.