There's no way I believe this is the real reason. The whole history of MS/apple/facebook and successful businesses in general is allowing others to experiment t

There's no way I believe this is the real reason. The whole history of MS/apple/facebook and successful businesses in general is allowing others to experiment to create add-ons / apps then creating your own integrated version to capture the value. i.e. let them pay the cost of experiementation and then copy it. See MS office, MS internet explorer, MS games, MS teams, Apple sherlock/watson, Facebook UI,......