I wouldn't be surprised if he was underpaid, since as a college student it's not unusual to work as an intern or for a lower-than-market wage. He gets valuable experience while building an online resume of real-world work that can be checked and critiqued. With something like a YouTube channel, there is the added benefit that it can serve as a timeline, letting prospective employers see his progress over time.
Until recently, he would also have been able to take advantage of the recommendation of a content creator who was doing important work and had made a name for himself, even if it was in a relatively small pond. Now that Evans has set fire to the pond (and burned his reputation to a crisp in the process), the recommendation won't be as useful, but at least the body of work is still there.