Please, read carefuly Keep4eveR's principle and make your own opinion.
Tuna, I have nothing against you, but you're Microsoft team funder, and Microsost have interest that Keep4eveR can't live.
Thierry, I would suggest that you keep this conversation on a factual level as opposed to throwing darts at what I have done in my career. I am just someone who has worked at Microsoft for 23.5 half years, from age 25 to 48, doing development work, ranging from an individual developer to a mentor to a lead to a development manager, working about 80-100 hours a week, starting with Microsoft Project and ending with Microsoft Office. I have never worked for SkyDrive, LiveMesh, OneDrive, or any other reincarnation of such distributed file storage and backup systems. Even if I had, my words/actions would be totally nonbinding to Microsoft's current policies of which I am blissfully unaware. At the moment, I use OneDrive and DropBox, along with a homegrown system of two RAID5 NAS drives at home each 7Tb, located at different points in my house to protect against any earthquake/water damage as well as theft. And, if your system were to work as a commercial, proven and fully supported system that can backup Terabytes of data fast and secure and efficiently, both at the storage and restoration end, including doing versioning as each file changes throughout its lifetime, I might give it a try.
But the conversation here is if it is appropriate to keep it as a BOINC project and lure people to donate their machines as storage devices lured by BOINC credits. That is the only point in this endeavour that I am questioning. Let's keep the discussion limited to that as opposed to my past and your perception of what hidden plans and desires I or Microsoft might have regarding your project, because there is none.
I wish you all the good luck in making this a reality. However, keep in mind that many projects that depend on many customers providing some support (BitTorrent, BTSync, Spotify, etc.) reached this without piggybacking on existing scientific platforms like BOINC.
Tuna
PS: If you (or anyone else) is really open to hear the truth as opposed to believing an urban story that sells newspapers: We worked 80-100hrs/week at Microsoft NOT to take over the world and quash our competition with mediocre software, but because we were absolutely paranoid that someone else would make something better and make us look like idiots. I remember so many sleepless nights I spent alongside my team when I heard that a customer found a bug or some bad behaviour in something I worked for so long and hard. We took pride in what we did, and took any problems very personally. You can chose to believe me, or some popular notion that any big corporation like Microsoft is just an evil blob. Remember: If you are successful enough in anything you are doing, however small it is now, one day you might become a large corporation, and people will think you are evil no matter what your intentions were & are. Just like it happened to Google; they started with "Do no evil" in their corporate bylaws, and are now involved in many very very large international lawsuits.