PewDiePie, or Felix Kjellberg, has the most-subscribed YouTube account, period. (And has held that top spot for at least two years.) His videos, which mostly feature him wildly reacting to the games he's playing, have 9 billion cumulative views. And according to Swedish newspaper Expressen, the channel netted him $7.4 million last year, pre-tax. The money comes from pre-roll ads that appear on his videos.