I don't see a problem with this. People mention how you "pay" for windows, but the cost of windows is not a fixed price, it's a recurring price thanks to Micros

I don't see a problem with this. People mention how you "pay" for windows, but the cost of windows is not a fixed price, it's a recurring price thanks to Microsoft's support system and backend services. Putting an ad into the email client is no different than what Google does, minus the small upfront cost that Windows charges. Don't want ads, pay for Outlook or use a Mac/Linux. Easy.