Earlier quoted context omitted.
> But, what do you do with your counterfeit coins? Launder them through your other criminal activities. "Hey, you want to be paid for all the drugs you've sold recently? You can have 500 in 'real' or 1,000 in fake notes + coins."
I think you'll find most people drug dealers interact with don't take kindly to being passed funny money.
Also, this is not a case of the supplier trying to con its "client", but one of choice. "Would you prefer real or or more in fake ?"