[DaveRobertsAhoy]

Neither consumers nor businesses are loyal to Groupon. And the moment deals start to decline in quality, consumers will hit 'Unsubscribe' or 'Report as Spam' and it's Game Over for Groupon. I've already tired of their endless emails and blocked them. I'd be interested in seeing their churn rate - acquiring new customers to replace those that leave is going to increase in cost exponentially.