The largest Microsoft subscription account is the United States federal government. Windows/office/whatever else for every federal employee pays the company enough to continue development and offer it to the masses. I’m certain that the ability to collect habitual data on users is valuable to both Microsoft and the powers that be, for advertising and criminal investigation.
The only thing that surprises me is the lack of any additional cost to end users. It’s almost as if the majority shareholder is Blackrock.