The hallmark of the Ganscult is its intense secrecy. It's like the rules of Fight Club: 1st rule: you do not talk about Fight Club; 2nd rule: you do not talk about Fight Club. Members attend meetings for decades and tell nobody, not even spouses. In other words, they are compelled to lie. It's all justified under the four degrees of truth which the cult follows:
Stupid Insincerity: Lying to cult leaders.
Stupid Sincerity: Truthfulness with outsiders.
Clever Insincerity: Lying to outsiders.