This article is extremely clickbait. Just say "open relationships" or "nonmonogamy". Seriously. there's a million and one good websites and books out there that can help someone who is thinking about dip their toes into nonmonogamy. Not everyone is into cucking (or some variation of it) which is borderline the take away from their article.
I get what you're ultimately getting at with this article, but in my honest opinion, the execution in the writing was done terribly. We can make poly more acceptable (or any variation of non monogamy) by having more positive representation of it within the common media (comic books, movies, tv shows, books, etc.).