Geez, vbseo has brand free (have for a while, did not in the beginning) and when you buy vbulletin brand free they give you the instructions to remove that copyright, that's what the extra $129 on top of the license is for (or whatever I paid, I'd have to look it up but I think that's what I paid for brand free.
And some do not install aftermarket hacks from vb.org. I'm sorry I just don't find anything you posted unusual, strange, or weird.
$117 brand free removal
https://www.vbseo.com/purchase/buy-vbseo-options.html