So Bitcoin-XX is basically in a win-all-or-lose-all position. It all relies on one condition: the support of major exchanges, merchants, and investors. Their consensus is what really matters. With their consensus, that could not be a Schism hardfork. Without their consensus, nothing will happen.
China is fundamentally disconnected from everywhere else though. There might be an outside possibility that certain Chinese miners and exchanges might attempt to soldier on. They don't sell in the West and Chinese traders probably barely have a clue who Coinbase or Bitpay are. It's very unlikely but if they're that turned off by XT and it's looking like a winner they might attempt it.
I am not so sure, I got the impression that big miners are selling their coins to the OTC market which can be pretty broad. hard to tell though.