... er.. what do you think people were doing at demo parties back in the 1990s?
There are multiple abandonware sites. They don't have every piece of Amiga software ever...
... If you want to regulate the trade, there are snags. If one person has a unique piece of software that nobody else has, isn't that worth more than a piece of software bundled with every Amiga?
And if it IS worth more - in what currency?
Don't get me wrong, it would be a very cool thing to have the equivalent of an iTune store or Google Play for the Amiga - mostly free, some very cheap, software.
It's a lawyers nightmare and an enthusiasts dream.