They exist. Their leader is in prison because of his sexual abusive children.
There’s a bad reality program late late at night on court TV and it’s about some of the girls who have gotten away and they spend their time trying to get others out.
Here is a link to escaping Polygamy. The Kingston ult is very real and this is their story. I watched in some years ago and found it fascinating.
/www.mylifetime.com/shows/escaping-polygamy