Economy problems
I generally play with the Terrans. Most of the times now in the TA I've been holding down the colony rush because of the manteince costs, and selling techs to minor races and another major races untill I can actually keep on. Last game I played, for some reason I would have been completelly unable to become self suficient if I hadn't stroke a economic deal with the Krynn.
Basically my question is: How they manage to get a income so big that the income I gain from the economic deal is more than twice/thrice my whole tax+turist+trade income?