No problem. He can just dust off his business contract with Yelp and have the courts set them straight. No contract? Then why would one expect the world to cater to their whim. Yelp promised nothing and he got exactly what they promised.
Used to be that, coupled with competition with competing services, was the main reason sites offered APIs.
According to the article, Yelp promised him 25,000 API calls per day:
> In fact, without me specifically asking for it, they provided a 25,000 per day API call limit