My go to example (that unfortunately wasn’t mentioned in the article) is the removal of a game called Oxenfree from everyone who bought a permanent license for it on Itch.io. This is the most egregious example I’m aware of, as the game wasn’t merely made unavoidable for new purchases, but removed from the players’ libraries. It’s not a theoretical example of what could possibly happen, but an actual precedent.
https://delistedgames.com/oxenfree/