As the creator and moderator of a 100k sub these are the last things on my mind - and same for the other moderators. The whole point of creating and moderating that was because 13 years ago I thought it was the best place to build a community that I wanted to exist.
I have no idea if that's true for the moderators for /pics or whatever massive sub-reddits are, but I do know that for a lot, and especially the long tail subs and the folks I see in the /modcoord sub and discord, moderators are people who are interested in maintaining a community because they are interested in the affinity.