Microsoft repo and key are automatically added to Raspberry Pis
A couple weeks ago, I noticed when running apt-get upgrade on one of my Pi projects that a new repository was added.
It was a little odd, because Linux distributions don't typically 'inject' new repositories like this. And it was even stranger because this particular repository was for VSCode, from Microsoft.
The Raspberry Pi Foundation just posted an article to their blog about Visual Studio Code coming to the Raspberry Pi—but that post didn't address any of the controversy surrounding this change.
There's also a video that goes along with this post: Is Microsoft Spying on your Raspberry Pi?
What Happened
In late 2020, Microsoft released a version of VSCode compatible with the Raspberry Pi.