I would say that the majority of it is crap, but I'll address the playing-card one, as I have some expertise in that area.
Yahweh said:
Common entertainment included playing cards. However, there was a tax levied when purchasing playing cards but only applicable to the "Ace of Spades." To avoid paying the tax, people would purchase 51 cards instead.
Yet, since most games require 52 cards, these people were thought to be stupid or dumb because they weren't "playing with a full deck."
The tax was on the entire decks of cards, not just on the ace of spades.
Decks were sold in wrappers, and the tax stamp stamped onto the outside of the wrapper. It became a custom to also stamp one of the cards in the deck.
This was not an indication that the one card alone was taxed, but as evidence that the
deck had been properly taxed, once the wrapper was thrown away.
At first, this one card was whatever card happened to be on top when the stamping was done, but eventually, it was most often the spade ace (at least among English makers), probably due to standardizing of manufacturing methods.
This stamping of the spade ace evolved into the larger, fancier markings on the spade aces usually found in decks today.
Personally, I think that whoever wrote that nonsense wasn't playing with a full deck. You gotta love the quote "these people were thought to be stupid or dumb."