You claim Sia issues too many coins. That is a myth. Inflation in 2021 will be no higher than 7%, declining every year after that. In case you are referring to the total supply, would it make you feel better to move the decimal to the left? Hosts have been saving and serving content since the launch of the Sia network years ago. It is profitable if done at scale. For more information, https://siastats.info/storage_pricing