http://awuuwa.i2p/webpages/randomstatementsandarticles.html
It's the concept of that digitial artwork in itself that is somehow owned by the copyright holder, in this case me as the original author of that digital artwork, somehow, even if I make a duplicate of the original copy, I am unable to sell it without selling literally every other copy in existence to you also, somehow. Like get this, let's say I've already made 100 duplicates earlier, and sold them to 100 different people, and I still retain the first original copy, so there are 101...