Short answer to how the Swedish comedien, Felix Kjellberg became so famous? Looks, personality, wit and unflappable cheek. He was serving hot dogs on a stall when he, a video games enthusiast like most of his peers, decided to do what he loved for a living instead, so he played the games online for everyone to watch. And they did.
His crazy, ear-catching name filched from Disney, PewdiePie helps, but it's his humour, shrieked out alongside said games, that viewers - fans - find fascinating. He parodies well known stuff, such as famous epithets or quotations, and makes them funny enough for people to love...and buy his book. 40 million followers? Wow, that means a lifetime income in a year!