maybe they are like a lot of us. They change their minds, leave, come back, try something like reborn or born again under different name. A fresh start or something.
Maybe thye intende to leave but just love doing the Poser stuff that they come back. Maybe they are just weird...whatever.

Humankind has not woven the web of life. We are but one thread within it.
Whatever we do to the web, we do to ourselves. All things are bound together.
All things connect......Chief Seattle, 1854