We're just gonna have to agree to differ then, I do take your point, however I don't believe accepting money defines a professional, you are professional when you act so, accepting money is only a small part of that and could also be described as besides the point.
What defines a professional, nouns & adjectives aside, is the way they act.
Quite often some peeps here suggest that there ought to be some sort of photographic accreditation for photographers, a seal of approval of some kind to make it easier for jo po to sort the wheat from the chaff when choosing photographic services, yet those same people are happy to let the word professional, which implies a minimum quality of workmanship, be qualified by payment for what could be a pretty **** poor service.
So which is it to be, because it makes my bum itch when I look at what I offer as a professional and then according to this thread look at what I need to offer to be labelled "professional", which is sod all as long as I take money off somebody.