Why do you think that being the exchange used for cashing out is a bad position to be for an exchange? My understanding is, exchanges earn money on commissions, so the more volume they get, the better, and cashing out sure is some volume. Those speculators who buy BTC on the wrong chain -- sure, they will take a hit on that. But the exchange itself will still get their commission just fine. Am I missing something here?
Well, it's not the first fork in the world, ethereum's fork was pretty big (ETH vs ETC). As far as I can see, exchanges just treat both sides of the fork as two completely separate currencies (which, in fact, they are).
