It's good to treat your customers well.
Marco is working at his successful car cleaning business and discovers $100 hidden beneath the seats.
Marco wants to do something about the money.
Marco informs the customer about the money he found and returns it.
Marco puts the money in his pocket rather than giving it to the customer.
Marco gets a lot of positive feedback when the customer posts about the good treatment online.
Marco loses a lot of business when the customer finds out and leaves a terrible review online.