There is, as you might imagine, often a great deal of overlap between the fields of “cult leader” and “drug dealer.” It’s not a sure thing as it’s often presented in the media, though - drug dealer is in fact an entry-level position in many cults, with higher authorities in the drug trade usually rising no higher than middle management in a cult environment. Most ex-cartel members lack the charisma to make the leap to cult leadership.
That said, the lower ranks of most cults will have a larger-than-average proportion of junkies, simply because the addictive mindset is one that can be easily exploited by strong personalities. We can see this dynamic play out at the Honeypot, Jakob Lynch’s casino in Malifaux. The place is wildly successful, and it might seem like an excellent financial move to sign on as one of his Beckoners, but wait until you get a look at their career arc: