Just for future reference, you are using the term externality incorrectly. The word you seem to want to be using in its place is "competitor." Externality has

Just for future reference, you are using the term externality incorrectly. The word you seem to want to be using in its place is "competitor." Externality has a very specific, economics meaning: https://en.wikipedia.org/wiki/Externality https://en.wikipedia.org/wiki/Externality