Microsoft to charge 7$ per user monthly subscription for windows 10(Enterprise)
forbes.com
forbes.com
Those end users probably average more than $50,000 annual cost, so while $140,000 looks like a nice big number, the context is $80,000,000 per month of other employment costs.
To me, Windows (and MacOS) are so relatively set that I could go without upgrades for a long time. I don't see how these are services...