Manipulating hashrate doesn't do much to influence the price, I think it will accomplish the opposite of what they want because BCH's total hashrate is now about equal with BTC's total hashrate and their difficulty will adjust again today. After this difficulty change hashrate will all move back into BTC and BCH will be left with months of extremely slow blocks lol. Imagine what that will do to the price of BCH. Maybe they will fork again to change difficulty, that should be fun to watch.

Hmm, won't BCH's difficulty be adjusted automatically, due to the changes that were introduced with the "emergency difficulty adjustment"? That will still leave them with a few days (?) of slow blocks though, and probably other exploits to deal with in the meantime.