From the Forbes article you cited: "While most people get apps from official sources such as Google Play or the App Store, there are hundreds of third-party ap

From the Forbes article you cited: "While most people get apps from official sources such as Google Play or the App Store, there are hundreds of third-party app stores around the planet, especially in China, where Google Play cannot operate. As a result, Android, in particular, has many third-party app stores." I think, your argument does not hold when put in the correct context. Also, it is 17.5$ Billion within 5 years, to put a time frame on it.