Satan and demons sell, they are great advertising.
Have you ever heard of Mike Warnke, Christian evangelist and comedian?
His claim to fame was Satan and demons as well and it made him millions of dollars.
In 1972, Warnke's book The Satan Seller was released. Written by Warnke, with help from Balsiger and Les Jones, the book tells of Warnke being orphaned as a child and his introduction into Satanism. Further detailed is Warnke's participation in sexual orgies, alcoholism, and drug dealing; his rise in the ranks of Satanism to the level of "high priest"; presiding over Satanic rituals including magical spells, summoning demons, ritual sex including a ritual kidnap and rape; the attempt on his life — a heroin overdose — that left him angry and disillusioned; his heroism in Vietnam; and how he found Jesus and came home as an evangelist. The story ends with Warnke living happily in California with wife Sue Studer. In fewer than three months after the release, The Satan Seller had become a religious best-seller.[1]
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On May 16, 1985, Warnke appeared in a prime-time news report about Satanism on ABC's 20/20. In the show's episode titled "The Devil Worshippers", Warnke was included in a number of segments where he discussed the implements and clothing used in Satanic ceremonies, a scar allegedly indicating where he was repeatedly cut so that his blood could be used in Satanic ceremonies, and what drew him to Satanism.[9]
He traveled around the country doing shows, he made albums wrote more books, etc. Christian magazines wrote about and interviewed him.
He was a Fake, his whole story about this was debunked. He was never in Satanism at all, let alone as a 'high priest'.
But claiming that he was set him apart, got him recognition, and made him lots of money.
Mike Warnke - Wikipedia