Assuming your just going by posts though.
Oh, I disagree. We also have more players, characters, and plots than pretty much any game. And of course we win the GM race by a mile.
It would be significantly smaller if people made the larger IC posts like other games rather than posting small messages which can be a minute as saying that someone nods or shrugs.
Since those small messages are typically part of conversations, there isn't really any cure for that unless we want to completely destroy basically all roleplaying.
You're forgetting TA, which is still really big, even though it's dead.
It's a lot smaller, in every dimension.
((That awkward moment when I think we already have a character with that name in canon, albeit one not used in ages.))
Not my fault Tori hasn't been around in like ever.