At one point in time, Felix Arvid Ulf Kjellberg — better known to fans as PewDiePie — was the biggest YouTuber on the platform. Through humorous "Let's Play" and reaction videos, PewDiePie ...

He earned $15 million in a single year, largely because of his YouTube Red series Scare PewDiePie, as well as his book This Book Loves You. For the most part, Pewdiepie’s wealth comes from ...