I think that people with high sociosexuality will commit adultery and act promiscuously whether they are in an ostensibly monogamous relationship or not. And even without regard to sociosexuality, there are people who are just not going to operate very well within a committed, monogamous relationship because of various behavioral and cognitive abnormalities. It's easy to see why those people would be inclined towards polyamory or open relationships. I'd imagine if you examined people in polyamorous relationships you'd see an extreme prevalence of depression, anxiety, psychopathy, narcissism, and even autism. But for people that don't have these problems, monogamy is not something that they have to sacrifice for. It's just normal to them, and polyamory is not even something that crosses their mind. If on occasion it ever does, they are mildly repulsed by it.
I don't have anything intrinsically against polyamory. As far as I am concerned they can keep to themselves and fuck their way to an early grave if they want to. But it's certainly not for me, and I think there are a lot of very understandable objections to people that engage in polyamory. The worst is that you'll get other people, who are also mentally ill, that use these examples of people who do this shit in order to "blackpill" people about monogamy . It's all a scam.
The Internet shows people who are truly a minority as representative of the entire population. However, this is a warped perspective. There is a minority population of people with high sociosexuality and associated behavioral, cognitive, and emotional disturbances, who interact with other people like them. It's the same group of people on dating apps. It's the same group of people cheating on their spouses. It's the same group of people that have issues with substance abuse and addiction. For instance, if you filtered out relationships or marriages involving young African males, a group of people who are significantly more likely to have high sociosexuality and cognitive/behavioral problems, rates of divorce, poverty, domestic abuse (especially marital rape), adultery, and STDs plummet. So when people use statistics like how 50% of marriages end in divorce, and something like 15-20% of people cheat on their partners (they inflate even that to imply everyone cheats, just like them), or how women are riding around on the cock carousel, it's all nonsense.
If you know someone, maybe they are in your friend group or you meet them through some youth organization, and enter into a committed relationship with them, regularly go to church with them, are the same race and nationality (excluding certain exceptions, like AMWF/WMAF relationships), with no clear history of substance abuse or criminality, your likelihood of being cheated on or getting divorced is almost nonexistent. People like Rekieta are the exception that prove the rule. And he is an example of someone who had the underlying mental health issues and profile associated with this shit, but suppressed it in order to obtain money and support from his parents.