Basically what Storj does. I am kind of wondering if they are backed by it based on descriptions
I confess that I haven't gone deep into Storj, but I am running a node for some weeks now and I didn't have to pay anything (besides the operational costs of keeping the server online, of course) to get into it.
You are earning money every month, but they keep a colateral and payment to you is delayed. If your nodes combusts one day, that colateral dissapears broadly speaking.
Also there are like 32 shards for each data, so 32 conpuetrs don't go offline in one day.
We now manage a network of over 250,000 NAS devices that are part of our network. So we know how to handle devices going offline without losing data. This approach has been used at scale since 2014.