Card 93 pays homage to all the freaks and oddities out there, as well as, the errors. Those are all words used to describe stamps that are extremely rare and usually quite valuable. The most famous error (probably) is the stamp known as the Inverted Jenny.
In 1918, the post office printed stamps bearing the image of a Curtiss JN-4 airplane (aka Jenny). The airplane was mistakenly printed upside down. I don’t know how many stamps were printed this way, but only one full sheet of 100 is known to have survived. A single Inverted Jenny stamp sold for over $1 million in 2018.
The next time someone tells you you’re odd or calls you a freak, think of how delightfully and valuably rare you are. And if you happen to be the person who owns the one (so far) Inverted COVID Card (the drawing side and address side are not oriented the same way — I don’t remember which card it was), take pride in knowing that it and $6 could get you a fancy coffee drink at most US cafes.