I hope this was the result of a rogue actor rather than a corporate decision.
"Because of a mistake a configuration change meant for some only some regions was also applied to Bing US. This has now been fixed." (To be clear, I just made this up.)
Edit: https://www.reuters.com/technology/microsoft-bing-raises-con...
Actual quote: Microsoft said the issue was "due to an accidental human error and we are actively working to resolve this."
Ditto.