I guess there must be some new topics in the mba handbook because every "hardware" company is now shifting into subscription model.

From cheap WiFi webcam to high-end cars, they finally found out that constant revenue is better for them than one lump sump, especially now that technology has reached a point where you don't need to change your hardware every 3 years.

And for a business, recurrent small fee are easier to manage than large fees that are often limited by amortization.

The "price per page" has long been a efficient business model in the professional copier world.