rrizoli
I hope that I don't offend you when I comment that you and I appear to be speaking different languages. In ordinary commercial practice - which is what we're discussing - the term customer, has a single,simple meaning. A customer is important and merits every consideration. No amount of semantics can change that.
According to some opinion on this subject, a 'prospect' is to suffer the indignity of being 'graded' in terms of priority and importance according to the whim and staffing availability of the business !
No wonder GA continues to shrink.