Though I remember Microsoft's CEO of the time a guy by the name of Bill Gates who said many years ago that he was envisioning all Microsoft's Products only being available on a Subscription Basis.
He used words like Cheaper for the user and better for us
meaning Microsoft.I didn't understand him then as I couldn't understand how a End User could pay less but the company get more money but I did very well understand that Microsoft expected to move to a Subscription Model of Business and was proceeding there as fast as they could.
May still be a bit early yet as ISP Connections and Data Use can be still quite high in places but if things continue the way that they are I can see the day when it will be the only option.
Personally I don't see it as Extortion but I'm sure that some Authorities will see it as Anticompetitive and act according to their current laws.

Col