No, I don't own the datacenter, as I probably wouldn't bother with backup services if I had millions to throw on a datacenter, and instead I'd be selling rack space and bandwidth ;).

Regarding the encryption: the files stored are not encrypted, it is your task to encrypt them, with whatever method you choose, as I believe this removes some of the limitations I might impose if I were to forcefully encrypt everything, though I understand this can make it harder for newer users that are inexperienced.