Thoughts on backups: If the backup method would add redundancy across chunks (parity) to be able to recover a missing chunk I could make sense to run verify weekly, or perhaps as often as internet bandwidth would let me, and re-upload chunks as needed to maintain redundancy level.
I wonder how the unlimited free GETs could tax the network due to these kinds of use-cases becoming too popular, by the way. It would be nice if we could just GET a checksum instead of a whole chunk.