Corey is observing a persuasive technique called a bandwagon. It's a logical fallacy.
Bandwagon is refers to as an advertising technique. It's a persuasive resource.
The bandwagon shows that a decision must be made by an individual because a large number of people are making that decision. Otherwise, this technique affects the individual's sense of belonging, inducing him to follow a majority.
More information about bandwagon in the link:
brainly.com/question/1058000
