Yes, the only reason we wanted to keep BetterMost a secret back then was because there were trolls who promised to follow us and wreak havoc wherever we went. So that was behind the 'inviting.' rather than open announcements.
Some of us (me included) were very paranoid back then - and with cause. I had set up a Yahoo email address and invited people who wanted to stay in touch to send me their email address, so that we could find each other if the two IMDb boards totally sank (which looked like a real possibility at the time). Most of the 40 or so people who emailed me were good old BBM-lovers, but there were actually 5 or 6 trolls who wrote too, trying to find out our new location, some posing as genuine CT folk. That'd make a person paranoid.
Once we realized that the administration here at BetterMost really pays attention and cares about keeping the place troll-free, we opened up about it on IMDb. We now occasionally DO post open invitations there to come check BetterMost out.