I used to moderate a lot of huge subreddits. Eventually got into the top 50 moderators by subscriber count. It was never a power trip, I just really enjoyed cleaning up garbage from the mod queue.
Obviously reddit is still running without me, but I used to do a shitload of unpaid labor to help keep that site clean. It was worth doing at the time, but everything I used to like about Reddit is gone. I don’t regret doing the work, and I don’t regret leaving.