@rosebot

For reference, this is the all the commentary I could find about that:

"I spent some time joking about how there would be a huge Squiddles intermission, with like a forty-eight-player Squiddle Sburb session, and we would get to know each one in great detail. I threatened this more than once, I think. But in the end, this three-second clip of nonsense was probably the closest we ever got to that. Sorry, buddies, you will be fondly remembered for the useless and utterly unwanted subplot you could have starred in." (Andrew Hussie, Book 3, Pg. 454)

"A twelve-player session is a big session, by any standard. Since I just make this shit up, I get to say what's true or not, but it does seem unlikely that they would get much bigger than that. (Sorry, the forty-eight-player Squiddle session was some bullshit joke and was never real.) It just doesn't seem logistically viable for many more players to play this game than that. But a twelve-player session would still ordinarily just have one set of ruins: a single frog temple with twelve surrounding planet-towers. This one is a special bifurcated session, though, as it says there. That means it has one usual set of ruins, which always end up next to the Forge. (The volcano there. All sessions start with one of those, except void sessions.) And also that the future site for one of the player's homes is nearby, like Jade, Kanaya, or Jake. But the underground Rogue Ruins site is quite anomalous to a session's starting planet. It makes sense that it's underground, hidden from view, and associated with Aradia. A planet is only supposed to have one set of ruins, so these are like the Shadow Ruins, which only conspiracy theorists whisper about. It's a fitting location for Aradia to begin her cloak-and-dagger campaign, assuming the role of Shadow Leader." (Andrew Hussie, Book 4, Pg. 268)

"Quick off-topic note: Karkat's reference to the forty-eight signs is based on the (fake) forty-eight-player Squiddle session that apocryphally created their universe." (Andrew Hussie, Book 4, Pg. 411)