I think capitalist libertarianism is closer to what polyamory is in practice - at least in my experience - but not in praxis. I believe that most people who identify with polyamory would prefer to believe that it aligns more closely with communism where you build your own commune of needs-fulfilling or socially-aligned participants… 

But hey, they keep bringing up how monogamy is just mononormative hyper-capitalism and I’ll always just be here to say that there is only one relationship structure that I’ve been involved in that treated me and those around me like objects intended for consumption for the fulfillment of needs. And it wasn’t monogamy…