I believe that Facebook slinging group is linked on our Social Media board,
https://slinging.org/forum/YaBB.pl?num=1701227208. If it's a different one let me know and we can link it.
On the other topic, if you're talking about active members, we're way lower than 10%. For "active" I generally figure that's someone who posts at least once a month. Yeah, the bar is low. It's slinging. What can we do...

I keep meaning to tally some numbers to see where they actually are, but the largest percentage of slinging.org members fall into one of three categories:
- Got an account and never logged in.
- Got an account, posted an introduction, and never came back.
- Got an account and posted for a little bit (say less than 50 posts, or less than a month or two of posting).
That is easily 90% of new member sign-ups. Maybe that's what CA was referring to with the "10%" (but I'm skeptical if it's that high). There are also hundreds (if not thousands) of old members that aren't around anymore. It's actually pretty hard to tally things up.
At the end of the day, it makes sense to me. The majority of people are going to see a slinging video somewhere and say 'That's super cool! I'm going to do it!'. They sign up on the forum, or Facebook, or whatever. Sling for a week or so. Lose the "coolness" aspect. And then drop it. You said the membership of that Facebook group has jumped to 9000 quickly. I'd love to know how many of those folks are actually slinging regularly. And how many will still be slinging regularly in 6 months. I don't mean to be pessimistic about the situation. There are tons of activities and hobbies out there that people try and don't continue doing long-term. If 1 out of every 100 people that sign up on this forum really get into slinging and keep doing it for years, I would call that a win.