(Assumption) They didn’t want to call it a chat room because that had a bad connotation in the early internet age and that bad connotation seemed to have persisted in the Frum community. (Even though chat rooms really ceased to exist by the time the CR was founded; this would more properly be described as a message board; which pretty much entirely replaced chat rooms by the early 2000s precisely because of the reasons that chat rooms had bad reputations.)