another bloody coupon siteSomewhere out there, there is a scuba diving school / cafe / massage therapy practice which does not have any way to turn money into customers into money into customers. If they had such a thing, it would improve the lives of their customers, allow the business to make payroll, and compensate the owners for the enormous risk, investment, and effort they put into the business. Delivering that -- scalable customer acquisition -- is a sexy, sexy problem. The coupon sites are an implementation detail.
I've got one customer who feeds ten families (and probably expanding soon) in the face of the worst economy his business has ever seen because Groupon Works For Us.