Thanks for asking this. I've wondered to. Wherever possible I go where the merchant makes the most from the sale, such as their own stores if they happen to have one.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi