To tack on another argument: Google Maps. Google sharply increased the price of using the Maps API, then decreased it when developers started leaving for other

To tack on another argument: Google Maps. Google sharply increased the price of using the Maps API, then decreased it when developers started leaving for other alternatives, such as OpenStreetMap: http://techcrunch.com/2012/06/22/google-maps-api-gets-massive-price-cut-in-the-wake-of-developer-defections/ http://techcrunch.com/2012/06/22/google-maps-api-gets-massiv...