> Duplication is for me something like cloning or a perfect copy.

That's fair. But if you aren't offering a perfect clone, then you're offering something novel that will 'wow' your customers, no? The market will never take interest in what you are selling if there is no 'wow' factor.

> Which I think is unusual.

You make a fair point that unreasonable terms on intellectual property laws has made it much more unusual than it should be, but isn't unusual historically, and shouldn't be unusual given our system of trade that assumes that clones will be produced. It's the only way most people can participate in the economy (and why they currently feel left out; but that's another topic for another day).