So I did a quick look and it seems like the total usage of siacoin is not that large.
https://siastats.info/hosts_network Only 710 TB is in use. Or about $20k worth of hardware TOTAL for the entire network, according to the above URL.
Also, why is this a cryptocurrency at all? Wouldnt this business be drastically simplified by simply paying people out//letting people rent space with either USD or bitcoin?