Then you need to read about "Gwen Shamblin".I think the closest thing to a cult I ever witnessed were those in the Bill Gothard Advanced Training Institute. But even those members were free to leave (and my friends did). For the children of the members, it was like a cult, but parental control is not a cult.
The Remnant Fellowship appeared to be like any other respectable church community with somewhat affluent members. They were not.