I am in beijing, and I can't access nodebb website or community without shadowsocks, I think maybe the China GFW block it. If nodebb need more people to use it. This problem should be solved, maybe build a mirror website?
May I suggest that the INVITE function be available to at least admins permanently?
It's an incredibly useful and powerful feature to encourage registrations, case example, if you pick up a few emails while out networking or have a mail database you'd like to use to drive users to your forum.