In the brain of a person, any average person is going to have some subconscious internal scoring system. Mess up enough and you get put on the "bad" side of their mind. That simply means their internal score or reviewing system puts you as bad.
Sentiment is everything in business. A business can sell products easier if perception of the business is good.
Like in Godfather? Repeating 100 times ''nothing personal it is all business'' and at the end ''in business everything is personal''?
Personal means to be focused on the persons and not on what the business is doing. Business is about supply and demand. A service or product is in demand and a business supplies what is in demand. Personal is bad for business if it interferes with supplying the demand.
Is demand constant? Business is for-persons. Are they incentivised to supply or to be supplied?
I don't understand your reference.
How supply-demand are related? increase supply from zero to something, how it affects demand?