The points in the OP boil down to:
* Focus on your product
* Hire well
* Be extra diligent towards bottlenecks
* State your metrics clearly
* Communicate often and immediately
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These are standard guidelines for running businesses. HN commenters are unimpressed because there are no novel generalizable takeaways from his document.
For a few years, Adam Sandler was producing low-brow schlock that made 100s of millions in the box office. It was effective. It's not clear if there was a takeaway
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There is 1 takeaway from Mr. Beast that appears generalizable.
Sometimes, for a short duration, you hit gold. During that time, obsessively extract all value you can. Merch, videos, exploitation, what have you. For a solid minute, you're Midas. So touch as many things as you can. Be shameless beyond recognition.
Too often, businesses see their hockey-stick moment as a sign of long term sustainable growth. That's a lie (in expectation). A moment is all it is. Wring out your business for every dollar you can extract, liquidate as much as you can, and bail before you're past the crest of the wave.
I'm confident that Mr. Beast's Youtube stardom will die in a few years. But, he will leave behind a legacy of obsessive extraction that is unlikely to be matched for quite some time.