My concerns with using Microsoft services (or Apple, or Facebook, or Google or ...) is that they are a maintained by a single entity for the purpose of profit,

My concerns with using Microsoft services (or Apple, or Facebook, or Google or ...) is that they are a maintained by a single entity for the purpose of profit, and if that entity makes changes I do not like, or cancel a product, it is generally difficult to migrate to an alternative because of intentional technical lock-in. There are many good examples of when this does not happen, and for-profit software is great, but given the potential for it to happen, I feel a lot better using open software, and failing that, software that uses open and standard(ish) protocals and formats. Note: I have not looked into SkyDrive, so they might not have any of these concerns.