It's down to how many views they get for the advertisements shown. I know a pro golfer whose channel has over 200k subs, it's his full time job and he employs people to make his videos. So there's decent wedge to be made.Question about these Youtubers..... Do they all make a living out of doing these clips or do most have normal day jobs jobs to finance the ' so called lifestyle ' and if so, how is it actually financed ??