My first post here was based on info I gathered around season 4, as far as I remember by a prety thrustworthy GM.
GM's however don't always know everything. In fact they know just as much as anyone else can know, but because GMs tend to read a little more then the average user, they give the impression they know more. ;)
All I say is:
Maybe the GM at that time was wrong (but I doubt this option)
Maybe the system has ben changed over time (which might be the case since BBs have been altering some stuff that had impact on the economy a bunch of times)
Maybe I recalled wrong (also a possibility offcourse)
Maybe something else...
As the info I see now in this thread is contradicting what I always asumed to be true, I think it indeed is valuable to gather more info about this topic.
They are not your friends; they dispise you. I am the only one you can count on. Trust me.