I bought an Ebay Office special a while back, and have only really started using it this week. I tried to upload 2.5GB to my OneDrive storage two days ago, and it just kept updating without uploading anything. I read this article yesterday:
https://www.computerworld.com/article/3430801/microsoft-axes-office-2019-from-home-use-program.html
and last night I logged into the Office site to see if anything had actually uploaded. I got an error message instead telling me that MS has determined that I’m using an unauthorised account and it’s being deactivated.
It’s probably just a coincidence, but that’s good timing.