Don't build a business on an API whose backend you cannot change at will.
Same goes for protocols (Facebook Login vs OpenID), format (DOC vs ODT) and data sources (Gracenote vs MusicBrainz). If you cannot replace a service that is behind an API with your own implementation, you must be ready to fold your business the day your provider changes the service terms.
Same goes for protocols (Facebook Login vs OpenID), format (DOC vs ODT) and data sources (Gracenote vs MusicBrainz). If you cannot replace a service that is behind an API with your own implementation, you must be ready to fold your business the day your provider changes the service terms.