That's probably true, though I'm not sure who has ever actually made a legitimate determination since you'd have to remove the non-humans from the numbers first and, well, Reddit isn't going to tank their MAU numbers by ever releasing that kind of stat.

It's also not helped once you hit a certain size and the nature of scale takes over and the level of toxicity goes up: even in small groups, when a new person shows up and asks the same question for the 20th time, they start taking shit for it. If you're in a BIG group, it turns into a giant dogpile, and people stop asking questions because who the hell likes that kind of response, so you end up with a lot of people who are subscribed to something, but none of whom actually contribute at all.