I've gotta say, I agree with Opalescent. Some, or even many, hierarchically-structured relationships may have problematic elements, but I don't think the word "cult" helps us untangle what those might be. I would save that polarizing label for the occasional situation that may actually deserve it.
Me, 30ish bi female, been doing solo poly for roughly 5 years. Gia, Clay, and Pike, my partners. Davis, ex/friend/"it's complicated." Eric, Gia's husband. Bee, Gia and Eric's toddler.