In my research I found the US Post Office was the third-largest civilian employer in the then United States. With the largest civilian vehicle fleet in the world and a big fuel bill. At this time the US Postal Service released Vision, a plan required by law, which introduced mail tracking called Intelligent Mail Barcode. Meanwhile professionals were openly critical of the Post Stations and felt it was time to change to email. When Post Stations realized email could possibly generate over $250 million per year through email servicing they closed all Post Stations.
Here files are lost. But it appears artists' groups individually bought or took over the Stations when it became apparent there would be no communication without surveillance. Over time the Stations joined into a loose coalition to harass their enemies and continue mail delivery.
Bin #94044 (archaic post zone code) contains artists' mail art. We do not comprehend this custom. The credit I am requesting is to research this matter further. It is key to the practice of the times that led to the Renegade Station Wars over communication privacy.