Growing a community that’s too big for you to manage is dumb. Sadly, it’s the goal of most corporate communities.
1 community manager looking after 10,000 members isn’t efficient, it’s wasteful. You’re wasting the potential of thousands of members who would participate much more if they had more people responsible for getting them engaged and involved.
Past a certain size, your community becomes unmanageable. You can’t spend as much time with members. You give each member less. In turn, each member gives less.
The remedy is more help. You convert your most dedicated into volunteers. Volunteers take on groups of members (divide by interest/friendship groups. These volunteers take responsibility for clusters of members. They ensure they don’t leave.
Figure out how many members you, personally, can take responsibility for getting involved. It’s probably not many. 50? 200? Past this number, recruit volunteers to help. Keep your community strong and concentrated. Don’t let yourself be diluted by an unmanageable level of newcomers. Don’t be tempted by bigger numbers to report to your boss.