I'm guessing that the secret chamber at the bottom of the list says more about the players ranking the cards than the card itself. Not many people seem to play it well. Beggar seems quite strong too, particularly in multiplayer, and Vagrant is considerably stronger than pearl diver.
Well, it's highly subjective of course.
Also, it's not a weighted vote (right?). There are more voters below lvl 40 than there are 40+ voters. So you would expect a lot of cards to be misjudged. And then there's Dark Ages, whose cards are highly likely to be misjudged as well.
Besides all this, it's hard to judge cards, because what do you do when one card is greatly overpowered in 10% of kingdoms (useless in the others) and another is useful, but not spectacular in 50% of them?
It's also a self fulfilling prophecy. If you think a card is bad, you will likely buy it less, and you will not get more proficient with that card, making you judge it worse than it actually is. I know I have this problem myself with some cards.
All in all this makes for not so precise lists and cards in weird places.
So you shouldn't take it too seriously. I would say only the top cards are in the right places as these are cards that are often bought and used. The uncertainty grows phenomenally as you go down the list.