Invests what? Time? Other than that, Smosh actually have to pay people - camera/boom operators, set designers, managers, etc. Smosh have been famous since nearly day one, so they have been doing all of the above for years. Toby Turner did the exact same thing as Smosh, yet I've heard no complaints out of anybody. I'm a fanboy of nobody, but Smosh does more than PewDiePie - Anthony does a channel with his fiance/wife, IanH, ShutUpCartoons, the main channel which must take a lot of effort, and their own gaming channel. Playing a game for 20 minutes while recording yourself talking isn't ballbreaking labor.