It wouldn't make sense to ban her again for something she's been pardoned for. Global mod already decided that her value to the forum outweighs the "crime", case closed. Unless something new comes up (a new post-ban case of plagiarism, or perhaps an old case of spreading malware, or something like that) - I don't think she'll get banned.
if it turned out that pardoned not for the "mistake of youth" but a professional thief, he will still be forgiven? Well, ok..
Don't exaggerate. You found one case of plagiarism and you can't even be sure if it hasn't been previously reported. And the post did have a link, which you stripped in your quote. Wrong link but taken from the original article so at best it's just a sloppy reference, far from "a professional thief".
You can PM hilariousandco and ask him directly if you insist.