It’s rather that the marketplace team seems to have a mentality of “we don’t care because we are part of a giant megacorporation”.
Which really sucks because this could put every developer who downloaded and uses these animations (or the many other stolen assets on the marketplace) into legal trouble, and the Epic marketplace team knows that very well.
And if Orca Games actually had an agreement with Mixamo / Adobe, they would write that in the asset description or as an answer to comments & reviews that note the stolen animations - instead they are begrudgingly offering a refund.