Frankly, I believe that this is a security risk for companies that want to integrate with Caviar. Since this criteria is outside the control of Caviar, it is possible to game the system.

Here's a scenario: Alice opens a new swanky restaurant. A few hipsters come by and give Alice's restaurant a 4-star average on Yelp. Alice asks Caviar if she can integrate with them. Meanwhile, Bob has another restaurant that competes with Alice's. Realizing that his business is vulnerable, he buys a few negative reviews of Alice's restaurant on Yelp. Because she had few ratings to begin with, and because Yelp believes the reviews to be real, her rating drops to 3 stars. Now Caviar won't let Alice use their service.

How will Caviar prevent this scenario from happening? Why not act like Steve Jobs and say, "This restaurant can use our service because I said so?"