An active populace.

There's no real mystery behind it.

When it comes to the population of LA/NY, it generally leans towards NY servers.
So having a massive LA populace, would normally reside in the earlier servers. Time-Space wouldn't sustain with a lower populace as it's not fair for the majority of competitive players.

I understand the concern and reasoning, but that's the explanation when it comes to the LA selection.

If you guys have any further questions, feel free to message me.