Well, of course. I mean it's not like you paid for a Microsoft Windows license when you bought your computer, so obviously they have to advertise to financially support it. If you're getting something for free, you're the product.
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Wait, I'm being told that when people buy computers with Windows installed, they are, in fact, paying for a Windows license, too.
So this is actually Microsoft trying to turn products they've already sold into continuous revenue streams at the cost of usability and customer happiness.
In other news, apropos of nothing in particular, Steam on Linux is working really well these days, with lots of AAA titles running just fine via Proton. Make of that what you will...