That depends on what the business is , for instance if you are a restaurant or food shop it would not be good to lose a customer because if they spread the word you could lose more customers or get closed down if it was for hygiene reasons ,and in any case you still wouldn't want to lose a customer because that is bad business.
Once you lose one who is to say you won't lose more, so from a business point of view the cost is great.
Once you lose one who is to say you won't lose more, so from a business point of view the cost is great.