Symform is the company that did this and I loved their model. Sadly, they went out of business. The idea of backing up your data across 38 peers, encrypted, instead of a central cloud storage service was enticing. Especially nice was that you didn't need to pay because you "paid" by also donating local storage. It's a great idea that hasn't taken off yet, not in any way comparable to Google Drive, OneDrive, Dropbox, and others. It's frustrating because "paying" for cloud storage by giving up unused local storage seems like a great alternative.