I've been in charge of a certain community for a very long time. Before my actual tech career started, even. Back when doing websites was just a hobby I didn't want to ruin by getting money involved.
I was put in charge of this community after only a few hours of effort: I wanted to learn something, I saw that a community didn't exist for this topic in some prime community real estate, and so I created one. Instantly, I was the leader of a community. Within weeks, people started pouring in.
The funny thing about being in charge of a community is that it doesn't require merit or community-building skills. Being in charge of a community merely requires that one have authority: The ability to decide who is part of the community and who is not. Because I founded the community, I had the authority.