Most likely Jihan Wu's degree on psychology at play here, by spreading his hashrate around and mining segwit blocks in some instances and don't in others, to trick people like franky1 into thinking his business is decentralized and he isn't calling all the shots. Naive in my opinion, that guys strikes as a classic control freak.
Too bad his shenanigans have ended up in a tricky situation as he finds himself holding massive amounts of bcash. Let's see how he gets out of this one.