Well, when I think in preserving this kind of things is to share with the community otherwise it doesn't make any sense in the big picture of event preservation. Following that logic most events are preserved since GF must have the original saves/ carts somewhere in their storage. I was definitely interested in helping but this way of not sharing things with the community its not my way of doing things and its not beneficial in the long term.
Even if this turns out to be legit, it's just as if no one ever found it since it won't be shared. Scammers online exist for everything and every Pokémon event so I don't think it will do any difference.
Of course the owner does whatever it wants, this is just my opinion.