Hi there, and thanks for the feedback! You're right, that question is poorly phrased, but I have little room to work with. If you can suggest a more clear formulation that fits in the same amount of space, I'd be grateful. Other messages I was able to compress better -- and thanks for noticing, that was a big part of the porting process. This one question was more stubborn.
As for the rules, most of them are vanilla Hamurabi, including those for immigration. I don't think it was ever supposed to be realistic -- just entertaining. For what it's worth, workers want 20 grain apiece in order to stay; keep in mind, that's pay for a whole year. How much they can each seed, you guessed without any help, so that part works well IMO.