Worthless at 23:30 UTC tonight (31st December) according to them :-( they tweeted 1 hour ago -
Bitfinex
Verified account @bitfinex
1h1 hour ago
We will be suspending trading in all Chain Split Token (CSTs) at 23:30:00 UTC as we prepare to settle outstanding BT1 and BCC for BTC. BT2 and BCU will expire worthless and be removed from user accounts by midnight UTC.