[minimaxir]

Huh, I just checked now and WSB does have more CCUs than I expected. (WSB has 38.0k CCUs, /r/pics has 36.3k CCUs)

That makes zero intuitive sense.

[occamsrazorwit]

WSB has more actual discussion, while people mostly see /r/pics on their feed (because it's a default subreddit) or scroll through really quickly (because it's easily-consumable content).