Don't make this mistake
A while ago, I optimised to grow the number of members in my community.
This was a mistake.
Quality of discussion dropped. The core members of my community left and started a group chat. The community started to suck.
So now I'm rejecting 95%+ of people who apply to join the community. And focusing on quality again.
The quality of your audience matters a lot more than the size of your audience
Was prompted to share this when I saw the results of @Blake La Grange's poll.