They are a large and wealthy corporation, with a lot of proprietary software and service products. It may appear, at times, that their interests align with the interests of end users or open source contributors, but that is at best a fleeting illusion; the moment they figure out how to make more money by screwing people, that's exactly what they'll do. That's why Recall is coming back to Windows, despite a huge backlash some five minutes prior. It's why the code to Windows and Office will never be open source. It's why the SSH remote plugin for Visual Studio Code is, for some reason, a proprietary binary that MSFT refuses to build for platforms that are not economically relevant to the Azure business unit (e.g., BSD or illumos systems).
