Watching the Reddark stream, I'm surprised how many huge subs there are that I've never heard of after 12+ years on Reddit. Many of them I would've subscribed to.
Too bad we'll never get to experience all those communities ☹️ (until they migrate here of course)
I think you underestimate how many mods are required to successfully keep the top 200 subs from being inundated by crap. It's likely hundreds of people, maybe even a thousand.