Meanwhile, there's services like Google Drive, etc which costs about $100/yr per TB. Still exorbitant, but not as much so. 3rd party software can mount it as a drive, but only for a short period of time before the token expires. So they seem happy to sell you space at less than 1/10th the cost, as long as it's harder to use.
There just seems to be a lot of cash on the table for someone to offer much cheaper storage solutions, but no one is actually doing it.