I'm constantly baffled by the copyright argument.
Intellectual property isn't even real property (exclusive power over a thing), it's a licensed monopoly enforced by the state, which gives the copyright owner power over many many things, present and future, not actually owned by them. Books that are in my house, software that is on your phone.
I don't want to argue that intellectual property should be abolished, I'm not convinced that that would be beneficial. But I think we can all agree that the currently landscape of intellectual property legislation is utter nonsense, that it's gotten completely out of hand, and that it mainly encourages concentration and gatekeeping.
So yes, the model producers have blatantly disregarded copyright, and have gotten away with it in ways which are not available to us peasants.
But we're the copyleft people, we should be pointing at this and shouting that the emperor is finally naked, and that it's time to curtail all that nonsense legislation once and for all, so that we can all be a little freer from the shackles of corporate monopoly.
And instead, we (the copyleft guys!) are just sitting here clutching our copyright pearls while muttering "but... But... Copyright! It violates the precious copyright!".