I clicked the link thinking "WTF? Didn't Congress do this during the Civil War in an attempt to prevent people from using postage as currency when the CS Dollar began to inflate?

A random bit of trivia - the CSA never issued coins. There were two attempts - a cent and a half dollar - but neither made it past the "proof" stage: https://www.pcgs.com/News/Confederate-States-Of-America-Coin...