Yes, quality control! That’s my only issue with sketchfab is multiple clones of the same model all up for sale by different sellers. Especially when you can clearly see the original free model listed…
One in particular is a pack of trees that are paid…but you see each one of them for free. The exact same models as the paid ones, just multiple accounts with the originals for free.
Heck, that same dang “stylized wolf” gets reskinned, re animated and listed for sale.