Newsflash: Apple is using its software to convince people to buy new iPhones. That classic Apple strategy remains one of the reasons why Android users will never, ever get to use iMessage on anything other than an iPhone.
Unnamed Apple executives confirmed that iMessage will never be expanded to Android. According to The Verge, Apple believes that making iMessage the top messaging service and keeping it iOS-only brings added value to owning an iPhone. Furthermore, iMessage already has one billion active users, which Apple thinks is enough to provide solid data for the iPhone-maker to venture into artificial intelligence and machine learning.