If the images are in the public domain, what sort of claim to ownership could justify Getty in charging for their use? Getty can't claim that it holds the copyrights.
No, they can't claim a copyright, but Getty is the defendant in this action. They only have to poke holes in the plaintiff's case. The way I understand it (and I have no particular expertise in this area) they only have to shoot down the plaintiff's copyright claim to dispose of this particular lawsuit, which is the subject of this thread. Getty's business practice of billing for copyright infringement where they have no ownership rights is certainly relevant, and is in fact cited to in the complaint. There are, no doubt, other claims that bilked licensees could bring in separate actions (again, I claim no expertise here).

