As always, it's Biblical. 1/3 of the angels fall down to earth, that is 33%. In freemasonry 33 is the highest degree. Free=no cost, mason=stonework, the name freemason is a reference to the stone buildings pre-flood that was built by/with the help of the fallen angels, and digged out of the mud after the flood.

Things are not as they seem, so much of history is a lie. They use the number 33 to code their hoaxes.

Freemason symbol.
Orgs signaling who is in control at their local branch.

Most do not know: The number Pi which is said to be irrational and inefinite, the first zero comes at position ( pisition) 33. The guy who found that did not publish the sequence till after his death. To me Pi is not irrational it is an algorithm with 33 positions.

Skull and bones number. 332. Also a 'number' of demons.