One thing I'd like to see decentralized storage protocols guarantee is that not only does the data exist on the backend, but is it available enough to be useful, and if so, are the latency and bandwidth good. PoST might be able to solve this if it enforces a strict deadline on the answer and tests availability sufficiently frequently. The other is some sort of authentication. Encryption of the data itself, IMO, is no…
By erasure coding your data over many providers, you minimize the amount of harm that a couple of bad apples can cause.