I think they should. Did they made it on purpose? We will not know.
I saw that kraken use BCH for bitcoin cash. Maybe this one will be used... maybe not. I haven't seen on their official page.

For who wants to know about what exchanges will accept it, i've made a post here:
bitcoin cash – how to buy / sell / trade / claim – after august 1st, 2017 fork
https://steemit.com/bitcoin-cash/@ilvstranger/bitcoin-cash-how-to-buy-sell-trade-claim-after-august-1st-2017-fork.