The article talks about counterfeit but doesn't talk about it in detail. Do these vending machines accept counterfeit old bills? If so, it seems like at some po

The article talks about counterfeit but doesn't talk about it in detail. Do these vending machines accept counterfeit old bills? If so, it seems like at some point genuine old bills will be scarce making it very likely that people desperate for old bills will more likely reach these counterfeit old bills?