This... is stupid.
Multiplayer game now. One player that has met 1 (one) other neighbor won the market. I have made contact with 4 others, and was at that time fairly strong economically. Wasn't even notified of its existence.
This needs to be a non-random blind bet, with bids, bribes, and base trade value. Nominations are silly; the capital should always be nominated automatically, one per empire.
And the fact that two empires in a universe of 9 can meet and make a market that will determine the economic world for the entire galaxy is silly. The market should not be created until there is one chain of communication among ALL empires (IE, not "all empires know all empires", but "all empires know all empires, or at least someone that knows an empire that they don't, or someone that knows someone that knows someone"), and similarly ALL empires need to be a candidate.