I'm thinking to same way too, but the current situation should be expected by them, so they might have some solution or strategy soon. (maybe?)
Anyway, just to add a small correction, ViaBTC allow us to deposit BCC, requires 1 confirmation to trade, and requires 20 confirmations to withdraw.
I sold BCC from first deposit, but need 20 confirmations to withdraw the BTC, and the second deposit seems it's going to take ages to arrive lol.
(That timestamp from screenshot is in UTC+8, which is about 6 hours ago for first deposit.)
There will be a backtracking of BCash supporters for sure. I think many of the holders are either dumping immediately or holding for some time while waiting for things to unfold and make a decision from it. It seems this update with miners leaving BCash will be kind of a cue for them to abandon ship.
Too bad for those retrieved their BCC from private key won't be able to dump them immediately anyway, those who stored their BTC prior to the split are lucky to be able to sell them for BTC immediately.