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about 4$ a day of btc

Interesting... According to this:

https://www.cryptocompare.com/mining/calculator/btc?HashingPower=2.3&HashingUnit=TH%2Fs&PowerConsumption=1200&CostPerkWh=.08

You'd only be getting around $2 a day in BTC, and the power costs would be more than what's being generated... How are you able to get roughly double that each day?