Re: 2 ("the rapidest share"): you can simply force clients to upload a file at least once before being allowed to download it. That is what Dropbox did after people pointed out this issue.
That is true but it changes the user experience and cost model pretty dramatically. This is designed to save all files including OS, so the de-duplication that they have would be only useful for storage and not bandwidth.
Comments
Re: 2 ("the rapidest share"): you can simply force clients to upload a file at least once before being allowed to download it. That is what Dropbox did after people pointed out this issue.
That is true but it changes the user experience and cost model pretty dramatically. This is designed to save all files including OS, so the de-duplication that they have would be only useful for storage and not bandwidth.
Did they? I thought they just checked bits and pieces of the file at random.