Say you purchase a Groupon for a hair salon or a house cleaning service only to find out the business provides substandard service to Groupon holders, does not offer the service anymore or the business closed, then you are out of your money because Groupon refunds in Groupon Bucks and you are forced to find another service with the same results. It's very difficult to reach customer service at Groupon, and when you do is long and cumbersome.