Well CMII wasn't ever sold. Mike Etler bought out the inventory from a dead company and even put the boxes together. He then sold them directly to collectors. Based on your criteria it really shouldn't count but most collectors count it because it is on the Etler rarity list.
It was my understanding that Cheetahmen II was produced in small numbers prior to the demise of Active Enterprises, and was liquidated to discount resellers (the early 90s version of Big Lots, etc). If that's true, I count it as a release, but only in the most technical sense... it was produced, then sent to retail stores. I know Etler bought some of the stock... did he really manage to get the whole thing?
Even if he did... I would still count it in the "released" category. It's not like there are many other games with such a unique history... it warrants bending the rules.
A few Sachen games WERE sold in the US back in the day but the majority were bought by collectors directly from Sachen after the NES life cycle. The exception being Huge Insect as it is a more complicated history. Huge Insect was never put into 72 pin form until a group of collectors convinced the company to make a run of them just for them. The purple box was the 1st release and the second time they did this the box was green I think? Not sure if there was a third run. Does it count? The other Sachens should but most don't count them for the same reason as above. Sachen games were NOT on the Etler rarity list which was then copied by all the others at the time.
Sachen is still an unknown to me. I plead ignorance on this one.
The Color Dreams Sharedata Chiller is rarer than any game on your list.
I know I've never found one. :-(
What of the bootleg multicarts sold here in the US? Sure they are unlicensed but so were others like all the Wisdom Tree games.
I don't count them simply because they're bootleg. Not an official commercial release (licensed or otherwise). It's similar logic to why I don't count repro proto carts-- since they're made on demand, they're as rare or as common as you'd like. Yes, there may be less than 1,000 in the world, but if you know for sure you can have one for less than $45, that's not really rare. I also don't count them in the "official" count because it's impossible to have a trustworthy list of what pirate games exist... and more are added every year.