“middle period” is pretty optimistic
“And as you see, children, this is part of the worship of the God they call Capital”…
The priestly class would congregate in tall temple-towers where they would divine the will of the market by performing arcane rituals involving cultic items called “spreadsheets” that were considered very powerful but whose meaning has been lost to time.
The prophecies divined from the spreadsheets would be used to determine the food rations of commoners.
The After the End mod should have this as feature of the Coffee Current with Columbia, sort of akin to the trade in incense from Arabia to the Mediterranean. Make it applicable to the Capitalist religions that follow the Profit.
I use it to beat my partner in Tetris