The world is built on Nuyen and the corps and governments know it, any successful counterfeit operations tend to draw ridiculously disproportional responses from said entities. Just like the real world look up the history of the FBI and secret service and what they have done with forging money in the real world, decade long, HUNDREDS of millions of dollars spent on investigations to catch guys that pass off less then 5k a year in counterfeit money. Counterfeit money shakes the foundations of the world. from what I have seen legitimate substantiated nuclear threats have drawn less response from the US government then the mere suspicion of a counterfeit operation. The short version is not alot of people play in that ring because the work to payout ratio is just not worth it due to how seriously the corps and governments come down on it, and how much resources they are willing to invest in shutting down and keeping it shut down.