I might be wrong here, but I think it's more that archive.org had already crawled and mirrored this page. Then the OP or someone else found the content that was

I might be wrong here, but I think it's more that archive.org had already crawled and mirrored this page. Then the OP or someone else found the content that was already there and shared it with people. It's not that OP or some archive user deliberately caused this page to be mirrored.