You neglected to mention that Microsoft employees reverse engineered the YouTube API's and then, for good measure, prevented ads from appearing in the app. They also had no permission to use someone else's IP.

>All to keep WP from being viable enough to have a significant market share

This is a company that not only had to pay developers to write apps for their platform, but would also offer to write it for them. They were never going to have a significant market share because of their incompetence.