Whenever other races try to initiate a tech trade with me, they always offer me New Propulsion Techniques in exchange for whatever tech they want, which is generally much more difficult to get than New Propulsion Techniques, and much more useful. Granted, the A.I. may think that New Propulsion Techniques is an important tech to have, but since I'm the Korx, and already have Ion Drive, it's useless. Shouldn't the other players be offering me deals that I'm actually likely to accept, trading one tech for one of equal or similar value?