I've been meditating lately on exactly what economic niches RTs exploit. It seems clear that typical milk-running of foodstuffs back and forth to hive-worlds, etc., is beneath them.
So, if your crew has a few hot tips, and you've got the probable location of an uncontacted feral world, a world similar to our own, and another world which is several centuries more advanced than our own, what kind of stuff exactly do you stuff your holds with and carry out there? What goods do you attempt to extract from them in return? What kind of materials are in-demand in more mainstream imperial worlds?
Essentially, I have little idea what should be in all those shipping containers. Or does the game simply abstract this issue?