One of the reasons for this decision is that even if we were able to provide backups we wouldn't be able to verify ownership of the pad to be able to share it. Also, if we have backups then data that would otherwise be considered deleted would not actually be. Unfortunately, this also means that sometimes data that we would otherwise need is lost.
Can I recover an etherpad?
It isn't possible to recover an etherpad, once it is deleted it is gone forever.