Another Perspective on Tooling/Kits.
Academy Models out of Korea, got their start by 'Knocking off' copies of other , more well known, companies kits. In order to evade Copyright infringement charges, they would change 15% of the tool, (either layout or content) , in order not to be sued. Now, they no longer do that, but I have built 1/72 aircraft kits where an Academy Fuselage Half would mate with a Corresponding half from a Monogram or Hasegawa kit. Academy not longer does this, but they did start that way.
My point, is that a Model Company based in a Non-Western Country, who did not mind the possible Blow-Back, could copy old Johan kits all day long, if they wanted to. By changing approx 20% or so of the contents, litigation about "Who Copied What" could take a long time, while a large number of Kits could be sold to modeler's who don't really care about legal niceties. Is this bad? Sure? But, an unscrupulous vendor could sell a lot of product, before the Cease & Desist order showed up. I believe with a Decent Lawyer, you could hold things off for a long time, provided it was only a partial copy and not an exact duplicate.