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Well, I suppose that nobody will make a fortune with a Vicky5 skin tatoo, so forget all above.

Exactly.

Using the courts to challenge a law is a tradition, and a respectable tactic.  Including the cost of legal action in the cost of production is reasonable from a business standpoint, but immoral in my opinion when it comes to matters of health and safety, as when pharmaceutical companies continue to sell dangerous drugs with the knowledge that their profits will still probably exceed their losses even if they lose a very large class action lawsuit.

Aggressive businesses have been known to infringe unregistered works, knowing perfectly well that their legal budget will permit them to bully an individual into giving up because that person cannot sue for statutory damages or legal costs -- which is why, even though copyright registration is not theoretically or legally required, in practical application, if you want to be able to sue, you will almost certainly need it.

In short, if it will break your heart to see your stuff infringed, register it and retain a lawyer.

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PoserPro 2014, PS CS5.5 Ext, Nikon D300. Win 8, i7-4770 @ 3.4 GHz, AMD Radeon 8570, 12 GB RAM.