Why does buying something from a company make you family?

A vintage scale holding a glowing heart and several coins in a market setting

Why is a retail company analogous to a family?

Transactional family love? I suppose that would be the case if your parents taught you that money is love and that business success and profit was the best thing you could achieve in life.

I can’t relate to any of that as far as money or friendship, or how relationships of true caring proceed.