How is 70% of the mining power directed at Bitch Coin? Did Bitmain hijack every Antminer on the planet? No miner in their right mind would voluntarily mine that crap. How did they get that much of the hash rate?
Why would do you assume they will not voluntarily mine BCH? They see this as an opportunity to get much more money for electricity spent. It will be over in a few hours anyway:
Coin Date (UTC 24h) Remaining Change
BCH Nov 12th, 21:09 3 hours, 2 minutes (131 blk) +400.00%
No way miners are that stupid. Unless they can sell their Bitch within the next 12 hours, it will be nearly worthless again. I think the larger problem here is that the Bitmain mining cartel has revealed their hand on how much hash rate they actually control. The community used to get upset when a pool neared 50% of the hash rate. Now we see that someone actually controls nearly 70%.