I had heard of all of these (except Popils), but was under the impression that they were all abandoned long before reaching this level of completeness.
If they were afraid of low profit margins on HuCards, I'm surprised that they didn't try to sell them as CDROMs (or Super CDROMs), as several games in the 1992 era were basically HuCard games released on CD.
Back in the day, I heard of "a friend of a friend" who owned a copy, but wouldn't even allow it to be seen (in action, or the proto-board), let alone sold/copied/whatever. It's very nice to see them on YouTube pages, to understand how complete they were, and how playable they were.
-Dave