Another point is though even if I had Sigma-13 under my complete pirate influence, I doubt I would ever go there to take in funds. As you said they continue to make the same trip over and over and start whining when you ask them for a donation for some 10th time, then they don't pay, you blow them up and they cuss you out. It makes me jumpy to say the least.
If they behaved like RP dictates, there wouldn't be a problem. But whenever I am in Sigma-13 on an indie pirate, I have half a mind to just go ask every OORP trader that passes me 15 million and blow them up when they inevitably don't pay. Rinse, repeat.
Where the hell are the Phantoms anyways?
Meanwhile we are straying off topic. What is needed is a trade route change and removal of that OORP diamond-niobium run. Nothing short of removing the NB-S13 jump hole will stop the traders from using it, but that's just stupid to do. So change the run to force them to act like a real trader, like for example take trade lanes rather than go through Chugoku which they shouldn't even be aware of.