I think SiaCoin has a great idea offering blockchain decentralized storage, use of contracts for storage rental, use of SiaCoin to generate payment and a mechanism to promote use of the altcoin. It seems if you want to offer storage this needs to be done with their Minebox (or Sia-Rig as you put it). I'm curious to know, regardless of contracts specifics, how SiaCoin and mine-box data storage providers guarantee "quality of service"? While most users would just keep their mine-box running 24/7/365, what stops a user from power it down for a prolong period or is it specified in the contract. What happens if the minebox fails, does SiaCoin rush a new box to the client providing contracted services, and mines data from the old box (even if data is decentralized-some of the data would still be inaccessible)? How can SiaCoin guarantee quality of the "minebox providers' internet service"? While most places have cable-modem/DSL, there are areas even in the most advanced areas of the world that are challenged with poor ISP provisions. I can only assume that enough redundancy is provided within the solution, that if a minebox went down, that the data is striped/or parity info. available or mirrored somewhere else? I guess i have scalability, redundancy, QoS, load-balancing, and other items like this on my mind when looking at SiaCoin's solution. I really do like what they've got going on.