Microsoft despite its revenue volumes is not exempt from trying to diversify its revenue streams through selling whatever data they have for ads/whoever wants it.
That's a HUGE part of the reason why I refuse to use any "cloud storage" aka OneDrive or whatever they call it these days, or any of the MSFT cloud services in Windows. Bing is the first thing I disable, along with all the MSN bloatware, and it's all done through a DNS block at the top of my network stack. Never connect the OS to the Microsoft account either, because the way the company works - they are not a friend of yours and neither are they going to help you re-gain whatever semblance of privacy you're aiming for.