This site is totally unofficial. Companies generally don't just give away stuff they own. They do sometimes turn a blind eye however. Such as to fan sites that love their game, but aren't causing problems to their business. I suspect that's somewhat the status here. (Fansites are technically supposedly illegal, and an infringment on copyrights or something).
Oh, and we've gotten a few e-mails and such from some of the game creators along the lines of "hey, nice site", but naturally by the people that made it, and not by the people/entity that owns it.