Everyone is in search of an audience, or in economic terms, each producer is in search of consumers.
Once you find a market you can tailor your fit to suit that market. I might start out making leisurewear, but when I discover most of my sales is sweat-pants, I'm likely to focus my attention there, creating more designs in a narrower niche.
"influencer" is a recent career option, so it seems like it's full of unknowns, but clearly it's the same processes. First find an audience, then do whatever it takes to enlarge that audience and make them "buy more tickets".
Music, movies and TV are the same - you might think Jean Claude van Dam movies are formulaic, but clearly he has found an audience that likes that formula. He can't make a romcom because his non-fans won't give it a chance, and his fans won't pay for a romcom.
If you find a sudden audience by going viral, then clearly you're going to try and hold that audience by repeating the formula. And wacko theories always attract good repeat customers, for reasons which are pretty obvious.
One person has perfected this to the point where his audience gives him $250 million when he loses a race, as long as he claims it won. Hmm, maybe influencer isn't such a new job after all (just a new job description).