I made a scenario and have been trying it out for a bit. Seemed to be good till I saw something. Playing with 4, teams of two.
My team mate, the Altarian's seem to keep making more and more freighters. It's got to the point where it is nothing less than insane. I'm pretty much in the middle of the galaxy toward the bottom, the Drengin are at my border to the northeast, Altarian's in the southeast corner, and the Yor in the northwest corner (I think).
Now when I say the Altarian's are making more and more freighters I'm not just talking a handful here, before I quit to take a break (and write this) they had no less than 50 of them swarming through my territory. Granted, they did have a few trade routes open, with minor races and not me, but holy hell. There is so much light blue in my area that most of the space is covered. Crazy stuff.