Morning Charles,
I don't think CSS or SSB will cease operations, not at least
anytime soon. CSS services cater to the low-fare ops, while TIBS is
to the standard-fare ops. If TIBS should decide to merge CSS
services into TIBS mainline trunk service, there will be a huge
public outroar. And IMO, I wouldn't want to see CSS gone from our
roads. It's quite boring to see all public buses from TIBS or
SBST.
Cheers and warm regards
Morning 
The guy we talked to at Woodlands depot has told us they have plans
to ceased CSS's operations .