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Animal Crossing: Pocket Camp will end service in Nov 28 - but will transition to a paid offline app
(files.catbox.moe)
Source about the offline app thing: https://faq.ac-pocketcamp.com/hc/en-us/articles/36353725150489-What-is-the-paid-version-of-the-app#
Who are the 99 other companies? Which games have they taken away?
https://www.pcgamingwiki.com/wiki/Category:Unplayable_games
And that's only PC games.
Looks like some of those are games that were cancelled, some were online multiplayer games that had the servers shutdown, some were simply removed from the Microsoft Store and some were single player games with always online DRM for which they shut the servers down. So it's not all super scummy nonsense
With the possible exception of games that were canceled, those are all examples of super scummy nonsense.