I'm convinced the majority of "unicorns" ignore (or actively dodge) externalities in favor of lucrative profits.
I think most companies develop convenient ethical blind spots where profit motive conflicts with the ethical problem from generating externalities.
AirBnB takes a strong moral stand on "inclusion" as a principle but has a clear blind spot when it comes to consumer, property, and residential externalities. Facebook takes a strong moral stand on free speech, but it has a clear blind spot for privacy and public discourse.
Other companies don't necessarily take moral stands, but they still develop convenient blind spots. Youtube (Google) and ideological polarization in its recommendations, Equifax and its lack of cybersecurity measures, and so on.