I think if they offered their product with some kind of backup to a cloud target it would be a little better. But I agree it is worth a shot for backup targets, etc.
I found it interesting that they were not trying to be a Cloud Backup solution. hell they are not even trying to be a backup solution. They are simply making a use for unused space.
There is a plethora of choice when it comes to cloud data storage. I think this may be a smarter move to skip it. Maybe a partnership for a sync to offsite kinda thing would work for them.
I could see them partnering with Box or Dropbox as a beneficial partnership.
I think they would be better served with real cloud backup, not a sync solution.
Why do you say that?
What is your goal? I think we are struggling to picture the use case that you are picturing. If you have cloud storage, how are you using Aetherstore? And vice versa?