I wonder if part of the reason for groupon's success is that businesses need to drop their prices because of the recession. Instead of directly dropping prices

I wonder if part of the reason for groupon's success is that businesses need to drop their prices because of the recession. Instead of directly dropping prices though, Groupon allows businesses to keep their headline prices as they were, but run these deals. The business owner feels better and more secure - it isn't a price reduction, it's a marketing exercise. But I wonder what the rates of repeat deals are? Any research on that?