It's a HUGE industry, it's not a secret, it's just something no one seems to mind because everybdoy's parents were into it in the 60s-90s
"I think my parents thought they'd found a community that shared their ideals. Cults rarely advertise themselves as such. It's usually someone saying, 'We're like-minded people. This is a community,' but I think the moment my parents realized there was something more to it, they got out," the actor said to Playboy."
"Actress Rose McGowan is also very candid about spending the first part of her life with the Children of God. Other actors like Winona Ryder, the Arquettes and even Glenn Close spent time in cult-like groups, but none appeared as extreme as the COG."
https://www.aol.com/article/2014/11/13/joaquin-phoenix-gets-candid-about-growing-up-in-the-children-of/20993283/?guccounter=1&guce_referrer=aHR0cHM6Ly93d3cuYmluZy5jb20v&guce_referrer_sig=AQAAAM03g_K0oXuxcCDIz2GbFQ4P5TxdgXtqRz893EAy03aI83pEG7snbsTH8TGNzuu1_0rWmQc-X74Q0yewH2i6DX52JKLBmXenR93wd5uBAY3hnMbk7sYcIEBk7BRxilV9YA_Bol7d2WeKPOAJCxA4FAp99CdBOuZYwNsRbWiBniPK
https://www.thefamilyinternational.org/en/
https://en.wikipedia.org/wiki/David_Berg