“Hello, I am Freya. I make a deal with demons for my rituals and spells, so all my spells come true.”

So proclaims the introduction to an Etsy shop that sells “Special Black Magic” for the price of $135.52 — a supposed 50 percent discount on the usual asking price of $271.04. A “Powerful Death Spell” from the same shop will run a person $271.04, though this too is on sale “for a limited time” from its usual fee of $542.08.

This purveyor of the demonic represents a fraction of the $2.3 billion “psychic-services industry,” which employs 96,909 Americans — most of whom are women — and attracts 15 percent of Americans as customers.