How profitable those pools are? AntPool makes the transaction fee off of every block and so does BTC.com. BCMiner takes a 0.5% cut but pays fees, same with slush except 2% and BitMinter with 1%. Kano.is also pays the tx fees - 0.9%. Do they have benefits? Yes. If you own a large pool, you have a higher chance of winning orphan races (confirming your own block).

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If your wondering how profitable the miners are, there isn't an answer to that since electricity fees vary.