Yep, you have to get those 8-10+ rated planets
Current Issue: I'm about mid-game and my economy is stalling. Trade routes are maxed, but I'm not doing a ton to maximize those routes (space stations).
basically, I've gotten to the point were I'm losing a dollar in funds a turn.
Now, I'd just build more stock exchanges and such, but they take FOREVER to build, so you need alot of factories......but if you have alot of factories, there isn't much room for stock exchanges. It's a bit of a catch-22. What do you people do for cash.