Capitalism isn't Sustainable(or efficient). There is a lot of overhead to make sure the wage slaves stay in line(Managment, and middle managment), and to make sure the wage slaves don't sue the company(HR), and to clean up the buildings the wage slaves work at(Janitors), and the cost of the building, all that plus, taxes, paying the greedy shareholders(The largest cost), Marketing(Ads).
Its A LOT simpler when its just a server and someone who enjoys working on it. People who keep repeating that this isn't sustainable don't know how shitty capitalism is. Its not the servers that are unsustainable its the parasites on top.