It's interesting, looking at chimps and bonobos it appears that both of those general strategies is employable, with bonobos being stranger friendly and chimps

It's interesting, looking at chimps and bonobos it appears that both of those general strategies is employable, with bonobos being stranger friendly and chimps being stranger averse: https://www.sapiens.org/evolution/bonobos-meal-sharing/ https://www.sapiens.org/evolution/bonobos-meal-sharing/. Not exactly the same as what is being talked about here, but doesn't seem far off - note the mention even of bonobos preferentially sharing with strangers over friends and family.