Network effect.  The important metric isn&#x27;t how many reviews you have, but how many your competitors and neighbors have.  If no one uses yelp locally, nobody wastes time on it.  My daughter&#x27;s optometrist has no reviews and the most popular optometrist in the county has five.  Clearly a waste of time.  My favorite &quot;old time&quot; hardware store has one review.  Yelp seems to be for coffee and food.  Observation shows possibly as many as 0.1% of coffee drinkers will write a review, and a local family run very popular burger joint that all the non-vegetarian locals have probably eaten at has over 0.03% of their visits reviewed.  That is far higher than doctor rates or hardware store review rates.  I drove past that restaurant yesterday and they had more local license plate cars in their parking lot than total lifetime yelp reviews... Clearly whatever it is they&#x27;re spending their time on is more financially rewarding than boosting their yelp score, LOL.