Making money is as easy as what?

I saw this article below on news.com.au and was so totally surprised I posted it here. I went to Felix's You Tube channel and watched 2x videos that he comments on TV shows and games. Apart from the profanity and there is lots of it, the content of what he does doesnt appeal to me really, but I am amazed and impressed by the simplicity of an idea that finds an audience and pays that much. I am aghast actually and ok perhaps even a little jealous.

NOT just an outlet for oddities, creativity and cats, YouTube is a lucrative goldmine and is making its users millions of dollars every year.We might roll our eyes at some of the inane stuff uploaded to the video platform, but according to analytics company SocialBlade those homemade videos are earning some users over $16 million a year.
User PewDiePie (real name Felix Kjellberg) who posts clips in which he comments on video games is the highest grossing channel on YouTube, raking in an estimated A$1.4 million a month (over A$17 million a year), out-earning professional TV stars.
It even out-earns Justin Bieber’s VEVO account, which was viewed by 108 million people last month.

       (Source: News.com.au)