Taipower is nationally owned which dominates perhaps 99% of Taiwan power supply. It charges household customers with absurdly low fee and charges enterprise customers even lower.
Last time when Google decided to build its "Asia Data Center" in Chang Hua County, the municipal head was so excited that he expected "Google's data center will create huge job vacancies and build large IT ecosystem in my county". It turned out that Google does employ 35 workers in total. I can imagine that Google also gives each of them a screwdriver and skateboard so that these high tech IT experts can swap broken hardware with spare parts 24/7/365.
One thing outsiders can never know is how much cheaper the electricity rate Google, AWS, and M$ have acquired/will acquire from Taipower.
Because of the nature of business secrets between Taipower and these profiteers, outsiders also have no idea what penalties Taipower will receive from the latter in case of sudden power outage.