Pricing is an interesting practice

They determined that when the prices were listed with the dollar sign, customers spent less. Conversely, when the dollar sign was absent, they tended to spend more.

Putting on my hack consumer psychologist hat for a minute…

The dollar sign is a symbol that connects a number to the pieces of paper we think of as money.

The absence of that symbol allows the number to remain an abstract representation, just like the bits and bytes of digital finance.