MLM Marketing Scam -- Gold Coin Investing

I was in the business section of an airport bookstore in Philadelphia. I opened a book on how to market on FaceBook. My heart jumped. There was $100 bill in in the book. I took it out and unfolded it. It was 2/3's the size of a real bill. On the reverse was a website. It was a slick piece of marketing for a MLM pyramid scheme. Someone had gone and inserted these things in all of the home business books.

When I did a bit of research, I found that it was an MLM scheme for investing in gold coins.  I sadly shook my head and wondered how many suckers parted with their money on this one.