I'll admin I only log onto my OSI to fulfill OSI's role play. If I need some cash, I call a mining op within the GMS. That said, I enjoy my time on OSI 100%, because I play my OSI for the role play of it. I also enjoy my GMS time 100% because its easy cash and always full of lulz.
That said, I do think there needs to be an adjustment to balance things out. Finding new members for a trading faction and keeping them is extremely difficult. Once they find out they can make more mining they usually leave or just stop playing their trader. If the admins pulled the activity/membership count on many of the trading factions some of them would be screwed because of something they can't control.