Review websites are big business. The Competition and Markets Authority, which investigates online reviews and endorsements, estimates that £23 billion of annual consumer spending is influenced by ratings.
https://www.thetimes.co.uk/article/dont-be-fooled-by-those-glowing-online-reviews-bt8snm85n/
Skedaddle, a company that calls itself the “Uber for buses,” has a radical new plan to eliminate tipping in the service sector. The company’s elevator pitch is to replace tips with customer-sourced ratings for service industry workers, including cab drivers, restaurant servers and even cashiers at supermarkets. These ratings can then be assigned a monetary value through a cryptocurrency.
https://btcmanager.com/kudos-project-replace-tipping-customer-feedback/