“They sent the email on a Friday and wanted a response by Monday.”
Kopec’s Restaurants app used the Yelp API since 2014 and averaged under 100 calls a day against a 25,000-call limit. Yelp moved Fusion to paid licensing and emailed on July 19 with about one business day to respond. Ten days after that email the key was dead and the app was off sale. Build on someone else’s API and your product lives until their next pricing meeting.