Technology

Not really! What about reputation score, etc?

You could actually say that about any business that accepts credit cards or digital payment at the point of sale. Try it.

Two points:

• cash-on-hand is a huge security vulnerability
• reputation is something that REQUIRES a tamper-proof network (virtually impossible without blockchain) and some sort of identity. If you attempt to centralize reputation (which would inescapably involve putting it in the hands of a for-profit corporation or trusted party(s)), you get gamification and a company that extorts people to get them to pay for positive reviews or to remove negative reviews like we see with Yelp!