you can call bs, but I get similar numbers - about 100~120 $ for 1 btc.
hardware cost excluded, but most hardware is working for months already. hell, i got bitfury gear which is more than 1 year old and still mining with profit.
So why is hashing rate dropping then?
maybe some noobs didnt do their homework and have expensive electricity.
I dont care really.
Expensive electricity and/or expensive hardware(imported stuff with taxes) and/or taxes.
How much left after taxes.
If you ever bother with them at all.