I am planning to buy Antminer S9 13 for ETH mining. This mining machine produces the hash rate of 13 TH/s. Which is incredible. Some questions are raising in my mind.
1) According to cost and profit calculators on the web, the income is going to be ridiculously high even if keeping power cost double.
For instance, on this website minergate.com it is giving profit per day $970402.48. Even if keeping electricity cost triple.
How be the real calculation calculated?
2) Other than difficulty level, on which factor the earning depends?
Any kind of information is highly appreciated.