Apparently, Fox thinks they're allowed to deface U.S. currency for profit.
I know a bit about currency. Part of my elementary education. Mostly what I remember is, "Money is fancy! Don't mess with it! The Secret Service will get you!"
I don't recall, "Unless you have a really good reason! Like money!"
Mostly, I like how they didn't intend to “suggest that there was any approval from the U.S. Mint or the U.S. Government.” That's what money means: the U.S. Government has approved this metal. They say it's worth something. Otherwise, it's not money. If something is on money, and it still functions as money, that literally means, "the government is cool with this."
Note that the Franklin Mint is a private company--that's not entirely clear in the article linked. New York Times has a better article (meaning: not cribbed from the AP) but you have to sign up for a free account.