Yeah it is interesting. I think if you lived in the states it would be a different story, maybe.
I know guys pay a lot of money for the rights for a product, logo, license etc but in the pinball world my findings and dealings with 3rd party and license holders is that they really only have the license for the name and not the actual art. I stand to be corrected there though. They also own f**k all original screens, scans etc.
I also know for a fact that none of them can draw and rely on volunteers to help out, which is why Planetary Pinball posted that they were recently looking for new people to help with cabinets scans, redraws etc. I think there regulars have gone underground as well for the same reasons I have quit. I know that there is art for almost every cab you can think of on the black market because I know a lot of the other guys doing it.