Ok, so as long as the user itself, or someone else on their behalf, makes 100% copy and store it locally at the user its ok as I read it?

Then next step is that the user can put all those GB on their own Dropbox (not shared). But what Dropbox can do is to do hash-check of the files and only keep one file of all those hundres of compies. Synced to cloud.

Still only the users copy and they can access it at home, just at a fraction of the cost for storing the copy.