Are you familiar with Influencer Marketing?
I am. It's when famous people are more the message than what they want to sell.
Exactly! It was completely found from personal influence.
I love the testimonies that people give from buying the product. 
I believe the testimonials from customers are basically configured based on how well the seller influenced them they needed it.
Have you read the books Personal Influence and The Effects of Mass Communication? 
I have not, what are they about?
the concepts of promoters and detractors.
The idea revolving around the "two-step flow of communication" was introduced in "The People's Choice" (Paul Lazarsfeld, Bernard Berelson, and Hazel Gaudet, a 1940 study on the decision making process of voters). This idea was further developed in "Personal Influence" (Lazarsfeld, Elihu Katz 1955) as well as "The Effects of Mass Communication" (Joseph Klapper 1960).
Influencers.
There is a lack of consensus on what an "
how complex a program you can write in Pascal", and the many libraries available from Borland and other developers, he wrote, "I am more and more convinced that Turbo Pascal is the programming language of choice for people who are more interested in "what" they want the machine to do than in how to make that happen. Turbo Pascal may be neither as elegant nor as portable as C, but it's sure less obscure. I think it may well be the language for the rest of us".