What is the ruling on working as an email coordinator for selling booklets that explain how to deal with the stock market, where the amount paid is recovered from the first buyer, and subsequent profits are pure, with each buyer performing the same process?

The buyer is permitted to copy the booklets and sell the copies. However, if the intention is to promote the product and persuade customers to buy it in order to obtain pyramid scheme revenues, then it is not permissible, due to its basis in gharar (uncertainty/deception) and gambling. To learn about the ruling on dealing in the stock market, you may refer to Fatwas No. 30649 and 31570.