MS should have realized by now that people don't quite trust them with this stuff, and they should have make it clear at the outset that they are never going to use this data for "sharing with their partners" or any purpose other than explicitly as a signal for improving specific Windows features.
They used legal language that allows them much more latitude than what they require. This is most likely intentional (probably for future competition with Google), but IMO they should have gone with a very narrow data use policy.