Yelp has more reviews than there are people in Tajikistan!

(According to these estimates).

A year ago Yelpers had written about 3.5M reviews of local businesses, today that number stands at a whopping 7M. It's amazing (and humbling) to see what can happen when millions of people come together to collectively share their local knowledge... consumers' lives have been improved and great businesses can succeed faster than ever before.