Question #3
When I generate cargo/passenger potentials for Lunion to Ianic, I get huge loads that would make any Far Trader profitable, as long as the run is from Lunion to Ianic. There is almost always enough to fill 90-100% of the hold on Priority Cargo, and always enough Incidentals to fill out the last few tons, if needed. There are also always enough High Passengers to fill out the staterooms, and Double Occupency is nice.
However, when reversing this trip, there is very little to carry back. The occasional Major Cargo, 0-3 Middle and 1-8 or so Low Passengers. Now, if a Major Cargo is generated in the upper tonnage, the profits from the lots of Priority Cargo shipped on the run to Ianic would be enough to offset the less than ideal run back to Lunion. But some of the time, it comes up with only one 10 ton Major lot, and maybe a couple of Low Passengers.
This, of course, may seem like the "luck" of all tramp merchants.
But, IMO, it stems from the TL modifiers imposed on Bulk Cargo and Passenger generation. There is an 8 point positive modifier applied when shipping from Lunion to Ianic, and an equal 8 point negative modifier applied when shipping in the other direction. Combined with their Population differences (Lunion 9 and Ianic 6), this is the reason why little is every available to ship back to Lunion.
However, I'd have to look at some of this carefully. For various Bulk Cargos, I'd have to say, yes, I understand why there would be little need to ship materials and goods back to TL-13 Lunion. But what about Passengers? With 60-80 passengers available per ship per week, that's a lot of people going to Ianic from Lunion, but much, much less coming back. That would seem to qualify as immigration (or political imprisonment, whatever).
Personally, looking at the extant UWPS, immigration (forced or voluntary) doesn't look like it's used much (otherwise we'd get a more evenly distributed population; instead of heavily concentrated on a few worlds).
I would *think* a lot of the "spot" market in High and Middle Passengers would be business travellers who can't get a seat on regularly scheduled trips or otherwise need to go *now*. If even 1/3 of the passengers going to Ianic were like this, then you could assume that a portion of that Lunion business "consultant/worker" population would commute back home occasionally (every three months, perhaps). This should, IMO, produce higher number of Passengers to Lunion than are displayed.
This, of course, factors in with Question #2, in my last post. If a ship's crew deploys two "cargo/passenger" acquisition teams, they'd double their chances for success (assuming anyone would allow it; I haven't answered it for myself, yet).