A small thought experiment now, say I run a restaurant and both Tom Hanks and Lebron James go on national television and declare it their favorite place to eat, what happens? I'd say starting the next day I'm going to be flooded with reservations despite the fact that the talents that make them famous have nothing to do with their ability to judge food.

Influencers are influencers because a large group of people act collectively to give them influence. The reasons why people give influencers such influence is varied but as a business owner all that really matters is how much that influence may be worth monetarily.

Why should I trust him on coffee machines any more than some hot girl in a bikini on Instagram?

I think they are doing pretty well for themselves but they never seem to have anything interesting and original to say.