Sure. For Sia we've used smart contracts to build a secure marketplace for cloud storage. Basically, we use the blockchain to create a contract between a host a

Sure. For Sia we've used smart contracts to build a secure marketplace for cloud storage. Basically, we use the blockchain to create a contract between a host and a renter saying that the host will store X data for Y amount of time. The renter pays immediately, but the host only received the payment after Y time and only if the host can prove cryptographically that they still have the data. You can combine this with encryption and erasure coding to create a near-perfect marketplace for cloud storage that's very competitive, private and secure, and extremely reliable. Here's a good place to get started for more technical information: http://forum.sia.tech/topic/107/interesting-threads http://forum.sia.tech/topic/107/interesting-threads Our network today sells storage for less than 1/10th the cost of Amazon S3.