Here is the rule:
NOTICE: Infringe advertising rules in SBF
Please do not post any outside links which consists details of an entertainment establishment which is profit making.
The following not allowed with out paying SBF advertising rates.
OKT or pimp
Escort
KTV
Pubs or Lounge with PR
Hotels with whores
Forums or boards which is profit making
etc
If you are keen to advertise please PM Super Moderator GreenTea for rates...
So the rule clearly states that no OUTSIDE LINK is allowed. If we discuss those websites without linking them, then no rule is infringed, just as we can speak about Apocalypse Now or Lush or Gossip, or mention Wechat or other apps, all of which are also for profit and are allowed to be discussed here.
According to this rule, there should be no problem mentioning danchoi or thiendia or kynu or banhmy websites as long as we don't make them links.