So there's been a lot of flopdoodle concerning the biodomes in Theta and how the loss of the same will spell the ruination of the Corsair people. Indeed a great amount of the lore that we take for granted suggests that food from the Zoners is one of the key factors enabling their (previously) enjoyed free pass card.
I figured it'd be a fun subject to discuss in brief. That being of biodomes.
You see, my theory is that there's no way that freeport could cover the nutritional bill of, let's say, 25% of the Corsair population. Assuming that the Corsairs and Outcasts are in step the Zoners need to thrust food into the mouths of roughly 100 million people. My theory is that the Zoners employ their go between status to pull that chow in from the breadbaskets of the core. Cambridge, Stuttgart, Kyushu, Honshu and so on.
So! That's the figure we're aiming for. What kind of kit would a freeport need in order to feed 100 million people. 1/4~ of the population of Outcasts as cited by the wiki.
For this experiment we're going to create a magical construct. A wonder of technology to rival that of faster than light travel and ships which fly forever. We are going to create a biodome which feeds one person per .5 acre and requires no seed, storage for harvested crops, fertilizer or any upkeep at all. A magical self contained device that can feed one person for half an acre with zero support or storage needs.
Now!
1 km² = 247 acres * 2 people = 494 people.
Now lets assume that a few of those people are fat and make it 500 people to keep everything simple.
100.000.000 / 500 = 200000 km² to feed those hundred million Corsairs.
So there's three biodomes at 9. So! 200000 / 3 = 66666.66 km²
Executor Class Star Destroyer = 19 km
Imperial Class Star Destroyer = 1.6 km
Now let's assume that the biodomes don't actually work like they claim to, that in fact they use magical hydroponics and only one layer is exposed to the sun. Let's cut it into, say, 100 levels.
66666.66 km² / 100 = 66.66 km²
So even a 100 layer thick super magical space future biodome is, individually, as long as three and a halfish Executor Class Star Destroyers. To put it into a term that most of the people here would understand.
So, yeah, I think the Zoners bring most of their food from the core.