Congratulations to those who are still having good profits by mining it.

I think these are the miners who have lower than $0.15/kWh electricity. If the difficulty rises as fast as before, they will not be profitable soon.

I pay 0.25 dollar /kWh and use the old 7970 to mine the Eth. I will not be profitable to mine in the next few weeks.

The Ethereum mining difficult is too high. For the ETH difficulty, it is all time high, if you add ETC, that is 20% higher.

I will just use the existing rigs to mine and will not expand. The big mining operations will move to China eventually.

If you have cheap electricity, you can buy the AMD RX 480, that is quite efficient, you can mine at 31 MH/s using around 150W.