It doesn't really make sense:
1. We will be crediting users who had BTC in their account balance at the time of the fork with matching BCH.
2. We have not yet determined if we will be listing BCH as a market on Poloniex nor can we commit to supporting BCH withdrawals right away.
If I get BCH but can't trade it (on a trading platform..) and can't withdraw it (on a trading platform..) then what can I do with my BCH?
Then let those BCH would sleep for awhile since you cant do anything about it,, cant trade cant withdraw. If you do have BCH and you do want to trade or sell but you cant is really a pissing situation scenario specially when you see the price have already been lowered on $400 as of now if they did this thing on earlier time and can able to withdraw or trade then lots of people will surely love it but for now. Its somehow senseless move from polo.