ChaosOS
Legend
I've always interpreted it as it's an intentional hole. Notably, no house deals with raw resource extraction - mining, logging, farming. Why is that important? The houses can't legally own land. This is where the nobility and the Aurum step in - they can own land and extract its resources. Sure, there's a diversity of local shops in town, but all the shopkeeps have to pay rent to the local noble who sits fat on his haunches profiting on other people's hard work.
Oh, also Eberron generally needs a labor revolution. But that's a different topic.
Oh, also Eberron generally needs a labor revolution. But that's a different topic.