Like everything, it starts with an organic foundation then slowly gets absorbed by capitalism. They're now brand reps more than anything. Subscribe to curiositystream, BlueApron, and watch your favorite streamer take an extended, nonchalant sip from their favorite [brand] soda, replete with logo mugging the camera lens.
Usually I just want to hear about the subject or the case he's making and having his face take up most of the frame is distracting and makes me uncomfortable.
Have you ever thought about reading books?
Sometimes I even read them.