I did the math on this once, and if you hire workers to stand around holding all the ore you find throughout the game, once you get into the higher levels of conterfeiting, it will easilly pay for itself and bring in a huge profit. I stockpile all my ore now.'
Counterfeiting takes a long time, like ~400 hours or some crap like that. While it may be profitable there's other things you can do to get money flowing with the number of runts you can employ. Things that dont necessarily require input material, or the input material itself can also be manufactured.
I came into counterfeiting thinking that "Okay ive saved all these chips all game long, practically every chip ive got my hands onto. Now that I can counterfeit I can convert everything I have nicely and cleanly into $200 chips as a REWARD for holding onto all that dough all game long" (including the money purses and bags of cash too).
The implication as a game mechanic is that
it has nothing to do at all with profit margins compared to other manufacturing items. Like the fact it would be broken in terms of how fast you could make money compared to manufacturing boom gun ammo.
Money chips are not renewable, you cant really get more of them without going out there in the world and capturing something or someone. You cant manufacture money chips by breaking down components of other things. And most of the money chips you get from characters you've captured tend to be Blue Chips and you still only get half as much. Unlike the Apples for chateau you find alot less chips comparitively, only specific missions have money purses, and even inventory carry-chips for characters tend to be pretty low.
Unless the build time comes down there's no real reason to invest in a Mint for it, seeing as a mint takes a bloody long time to build and is a dedicated building slot, a Refinery would be much better for producing chems and other components.
(I modded the build time for counterfeit projects to be about 1/4 what it usually is, I wanted to set it to 50 hours just to "copy and paste my financial troubles away like the guild"... and catch up on converting all that cash I had laying around, but decided that it needed to take some time just to not be too anti-climactic).