The regenerative ads that run the longest have something in common. They name a body part or a symptom, a knee or a shoulder, and offer a way to avoid surgery. "Stem cell" turns up mostly as a seminar topic, with a legal notice attached.1
Part of that is the rules. An ad cannot imply it knows the reader has a condition, so the good ones say "for people with knee pain" and name the city.2 Part of it is how people think. Nobody wants PRP. They want to carry the shopping up the stairs, or get down on the floor with their grandchildren.
The seminar is still the best second channel. Around a hundred active ads promote stem cell seminars, with dated events from Utah to Virginia.1 Its weakness is the gap between the RSVP and the chair. Forty people sign up and twelve arrive, unless somebody calls, reminds and confirms each one.
Honesty also sells better here. Current guidance supports PRP for mild to moderate knee arthritis after standard care has failed, and some trials show no lasting benefit past six to twelve months.3 A clinic that picks its patients carefully, and says so, closes more of them.