Its a type of new age MLM (Multi-Level-marketing), where they are actually selling F.O.M.O. to a generation of people who live off that. I'd hate to use the phrase digital snake-oil-salesmen. This behavior can also been seen in academy's now. People attend an online course on a topic, then after a year (or maybe even lesser than that), start their own mini academy or YouTube channel on the same topics but with their own flavor, proclaiming to be experts in the field.