MS has a track record of "disreputable" business practices. Many "free" things were offered to put competitors out of business for which they then charged for (Word vs. Word Perfect, buying Visio, then not allowing users to install purchased copies from the previous owner, et. al.). Only Intuit (Quicken) survived this barrage (MS Money flopped big time), and if it were not for Apple, anti-trust litigation could have been brought against them long ago (although they did lose the fight of "embedding" a browser into an O/S for those who remember).
I am hard-pressed not to see this "free" aspect being subsidized (by agencies), which want easy access to information (very efficient, effective, and "free"). Google has been "absorbing" data (for free) and putting companies out of business for years. If it is posted online, it is public domain; Google does it, and now MS can too.
[Insert hard drive manufacturer here]'s primary customer has been Google for years now. MS has more "control" than Google has, so they want their piece of the action (and have access to more information).