This is why the post is a red-herring. You cannot use storage if you cannot get to it. Talking about the price of disk space/mth is absolutely useless without talking about the bandwidth required to use it, which means, if you want to go big-boys-math, 95% bandwidth and peering agreement pricing. That $1.50 with all the network chatter between hosts for replication/repair/etc., not to mention actually _downloading_ of the data from the Sia network will take that $1.50/TB/mth to $70/TB/mth.
Talking about the disk-space pricing is, IMO, disingenuous. Talk about the math for an all-in use-case of the service. I appreciate what the OP is going for, however, hand-waving around uncomfortable critical items like bandwidth cost for the Sia network is not a good look.
Spoiler alert in FF2, IMO the single best RPG ever created in the history of history, there were a number of enemies that you could only kill by first casting a wall on one of your party then bouncing a spell off that wall onto the enemy. Great times...