Paranoid much? 
As a D'Haran townsland lord AND trader, I'll let you know that my food goes to buying food--and repaying the family for the double-investment I made in Paisly and Port Raviel after the capital move.
The reason I hate to buy from Madina is that prior to this war, they refused to sell to me--and when a region lord had food for sale at 50 or 60 gold per bushel, they complained that I purchased it! Gornak has a long, long memory, and he has no reason to believe that if Madina returns to a non-emergency state, that the region lords wouldn't shut down on food exports under the regular constitutional rules.
Indeed, Madina has a history of being a bad and unfriendly trading partner.
