In Bitcointalk's latest Mixer ban, Altcoinstalks made an appearance because many Mixer campaigns will be on Altcointalks now.
I'm not active on Altcoinstalks currently because many topics are much more interesting on Bitcointalk but checking out Altcoinstalks now might result in better discussions on Altcoinstalks, when more members are active:
Biggest disadvantage from Altcoinstalks: Activity has been very low and for many topics only few replies have been left.