unscrupulous business practices;  fraudulent business practices;  crooked business practices
 fraudulent business of selling goods by claiming they will bring supernatural benefits
 multi-level marketing;  MLM;  network marketing;  pyramid selling
 piggybacking marketing;  method of making sales by jumping on a bandwagon (like that of a boom, popularity, disaster, etc.)
 amateurish and haughty way of doing business;  venturing into an unfamiliar line of business (and often failing)
 work-at-home scheme (scam in which the offer of a highly paid work-at-home job is used to lure victims into paying substantial upfront costs)
 amateurish business methods;  bad business sense
 fraudulent sale of worthless land (e.g. by overstating its future value)
 unscrupulous business practices;  fraudulent business practices;  crooked business practices
 unscrupulous business practice of making sales by posing as an inspector and declaring the need for replacement items
 amateurish way of doing business
 unscrupulous business practices based on an appeal to one's social conscience;  sales methods in which someone falsely claims to represent a charitable organization
 unscrupulous business practices;  fraudulent business practices;  crooked business practices
 fraudulent sale of exorcism services (to people led to believe that they are possessed by evil spirits)
 fraudulent business of selling goods by claiming they will bring supernatural benefits
 bait and switch;  switch selling
 fraudulent business practice of luring people into investing by promising high returns