One of their mods, https://lemmy.world/u/sabbah, currently mods 54 communites despite only being on Lemmy for about a month and has never posted on c/documentaries (except for his post asking for people to join his mod team).
I mod a bunch. Only because I joined when Lemmy got it's big first wave, and the site was literally dead. My contribution was making communities for people to start posting in, because a ton of people simply don't want to moderate, or don't know how to create communities.
Within the first week I got a bunch of DMs from people asking to be mods, and I added all of them. I am not making communities to horde them. I am making them so people have places to post. To get the ball rolling.