/4 as a demonstration that a coin can and will be attacked if there is a will for it, miners choosing coins instead of choosing what is most profitable makes it into a power play. /end
but a miner might estimate that less revenue now is acceptable in exchange for keeping the BCH chain robust, in expectation of future stability and gain.
There are few actors that exclusively mine BCH, I think CoinGeek made a statement about only mining Bitcoin Cash, Calvin Ayre is very pro BCH, but it is not a economical choice.
The chain only needs profit oriented miners to be robust, the profit margins are razor thin with mining unless there is subsidies for electricity or machinery, the price set the hash.