A chat room would require them to have full time mods, because you know that would become a sewer fast if not watched closely. Also, IMO, that kind of open medium could possibly allow SJW enemies to slip into the site, put up poisonous rhetoric, and make false claims against G&G before they could be stopped.
Jeremy has already said that everyone helping is basically doing it on the side, so it would require commitments and investment G&G might not be able to cover at this time.