Well this article doesn't seem very good. Not least because the author seems perfectly willing to not actually explain the detail, and then jump to conclusions. Having read the actual detailed article what seems to be happening is that some customers buy "on-premises licenses" without mobility rights, and MSFT used to let them use those licenses on outsourced hardware. But people were using those licenses to just put…
Also as they pretty much turned a blind eye on this practice for years now they just created the perception that it is fine and legal. I absolutely can't blame people for getting mad at them changing their minds now. Either have a clear stance on it right from the start or deal with the backlash. That is, we still have to wait and see if/how much there'll actually be...
Slightly related to this: it was quite remarkable how long it took Microsoft to understand and accept that one OS install doesn't equal one (physical) machine. Even back in the old days when you just wanted to have a master hdd image to clone to all your workstations there was no official way to do this. Third party tools did voodoo black magic after dumping the image to the hdd. So it's not that surprising it took them so long to react here... Dynamically spinning up as many identical Linux VMS as you want and have them execute some container? Maybe network boot them? Crazy talk in Windows land for a long time.