About planetform. 1: I don't think there should be more terraforming projects than there are. They likely cost trillions, and take hundreds of years.
That's four bases, where Planetform is actively engaged in doing terraforming, each in a different stage. In Bretonia, there are some very late stage planets, Ayer and Harris...these should be buying for rather a lot things like fertilizers, alien organizms (and new commodities, plants and bacteriums). Their exports, other than possible waste products, I cannot imagine. The Liberty terraforming should involve moving Oxy, Water, and terraforming gasses, and probably high ammounts of HFuel to the worlds. Again, exports toxic waste.
The biggest problem is of course the fact that terraformed planets are themselves products...they don't exactly produce things.