When I went to go pick up my girlfriends arcade console at GS he asked if it was okay that he open the box in front of me. I said yea why? And he told me he was switching the arcade disc in there for this other one which was a double case like the old Star Wars/Tetris or any of the other 2 free games with an xbox console. So he replaced the included arcade disc with the Sega Sports Tennis/Arcade game case for the holiday bundle.
I asked him what would happen to all of those left over arcade console discs then, and he looked at me and said, well knowing the store we are probably going to take each one we replace with the holiday bundle and sell them, even though they are technically free.
At least he was honest! And I got the Holiday bundle the day they came out so they probably just finally started putting them all out for sale. And this is the reason they why many of yours look so brand new. They can't sell them as brand new seeing as it says not for individual resale, so they just tear them open and sell them as used games, even though they case and disc are brand new.