still looking?
I have a group with 80,000 (adult themed) - We get 2k-3k new members daily on average by them requesting to join
the group is very active - however, a lot of bots/spammy accounts join. If you have dedicated admins, you can easily clean it up.
he probably meant a bitcoin related facebook group. i am one of the moderator of a fb bitcoin related group, i'm free to post there and pin your post. if this is what you are after let me know and i can post there and pin your topic for weeks for a price. pm me.