If a hair loss product is really effective as it claims to be, in the case Scalp Med, why not give a well known baldy man in Hollywood like Bruce Willis a year supply and let the people notice if there is a chnage in his hair. Unless the Scalp Med do this or any other comapnies, I would remain skeptical.
This is not as easy as you make it. I am answering your question as a businessman, not as a doctor. The rich and famous value their time, privacy and endorsements, and they get big money from it, not a year’s supply of some menial substance that may or may not work. I suspect that you have good common sense and are applying it to things well beyond the movie watcher you probably are. I would do a hair transplant on some famous men for free just to get their endorsement 8 months later, as the world would see the transformation just like those hundreds of men posted on newhair.com. But the rich and famous are not interested in the money or any increased fame, what they are in most need of (if their hair loss bothers them) is the drive to research hair transplants and the courage to face their vanity.