MrBeast has 480 million subscribers. He got there because he and 4 other YouTubers ran the same Skype call every single day for 1,000 days in a row. Some calls ran 7am to 10pm. Sleep was the only bottleneck. They didn't talk about life. They studied thumbnails. They pulled a thousand thumbnails from a thousand videos and ran a correlation between brightness and view count. A product analytics workflow, run by five teenagers in different bedrooms. All five had around 10,000 subscribers when…