A couple of the definitions (brief):
Experts who study cults suggest the human need for comfort prompts people to seek out others or things to soothe their fears and anxieties. Research suggests that these elements and others have led hundreds of thousands of people to commit to of cults operating around the world.
With RCism, it is the promise of suffering here on earth which will guarantee you rewards in the afterlife. Like all religions. But we need your money.
With Trump, he is the sacrifical lamb on the altar of Deep State. But even though bragging he's got billions of his own he desperately needs your money to save him.
Bottom line is, of course, that it's all about money and the poorest of the poor are usually the ones who give it. Willingly, hopefully, thinking that their lives will be somehow improved, that the ones leading them by the nose will "save" them from the boogey man who lurks everywhere ready to pounce.