Why can SFIL realize sustainable mining?
The cost of Filecoin hashrate includes storage hardware, GAS, and pledge coins. After the 540-day encapsulation of the sector expires, it can be encapsulated again to continue mining. There is no need to repeatedly invest in storage hardware and pledge coins, only a small amount of GAS is required.
Therefore, FIL hashrate can technically realize sustainable mining.
At present, most hashrate service providers do not support sustainable mining. It is not technically impossible, but a design problem in the business model.