I believe a lot of Yelps employees are outbound sales - they cold call small businesses and try to convince them to pay Yelp money. More generally, it's kind o

I believe a lot of Yelps employees are outbound sales - they cold call small businesses and try to convince them to pay Yelp money. More generally, it's kind of amazing that any company with 178 million unique "customers" only has a few thousand people working there. I know this is the norm nowadays due to the power of computers and the Internet, but I imagine how many people would have been employed to perform the same tasks fifty years ago and suspect it would have been three orders of magnitude higher (and completely uneconomical to do). Progress is a pretty impressive thing.