http://www.scroogled.com/Home says "stop Google reading your email". The same page links to http://windows.microsoft.com/en-us/windows-live/microsoft-se..., which says, in part:

we may occasionally use automated means to isolate information from email, chats, or photos in order to help detect and protect against spam and malware, or to improve the services with new features that makes them easier to use. When processing your content, Microsoft takes steps to help preserve your privacy.

That document links to http://privacy.microsoft.com/en-us/default.mspx, which says:

We use the information we collect to provide the services you request. Our services may include the display of personalized content and advertising.

Pot. Kettle. Black.