I must be completely "dull witted" then. When I first started looking into lemmy, I went to the official "join-lemmy.org" website, clicked on "join a server" and picked one of the top listed recommended results. It just happened to be a VERY small and VERY new instance. But as a completely stupid dull witted new user who knew literally nothing about lemmy, I didn't know any better.
After joining that instance and looking for communities on it, I only saw the local communities plus a few non local communities from larger instances and I legit thought that's all there was on lemmy. I mean, it was clear I was seeing the local ones, and it was clear I was seeing some nonlocal ones, who why tf would I expect that I wasn't seeing everything?
Your perspective is tainted by the fact that you know how it all works. People new to lemmy don't, and I'm telling you that the onboarding and community discovery process is dogshit. I beg you to try considering things from the perspective of a newer user.
Putting a Netflix show on DVD and selling it is absolutely illegal unless they have a distribution license provided by the copyright holder.
It would be legal after copyright expires (in the US, copyright exists for the lifespan of the author/creator + 70 years). Keep in mind that the US has stricter copyright laws than most of the rest of the world.
For other items, like physical functional items, reproductions are generally legal unless the item is patented. And it would still not be legal for the reproduction to also reproduce any registered names or trademarks associated with the original. Example: you could legally reproduce and sell knockoff Nike Air Jordans as long as you didn't use the Nike swoosh or any likenesses of the copyrighted artwork. For items that are patented, or patent pending - making and selling reproductions is illegal - and for most patented items the reproduction doesn't even have to be identical for it to be infringing, just replicating the functionality is probably infringing.