Not sure what you are talking about. Hypergamy is about a difference in social status between the partners. More here: https://en.wikipedia.org/wiki/Hypergamy

Since you were talking about a "redpill perspective" you may have wanted to find a term that describes the idea of having intercourse with a larger amount of others. Maybe you searched for "promiscuity"?

If the latter is the case I'm not certain how it relates to the article. The article elaborates on common problems in monogamous relationships.