The biggest problem with this (of many) is its really hard selection bias. He did invest/funded way more than 8 Companies. This makes it seem, that 100% of his business ventures worked and he's a mistunderstood genius or whatever

Probably 90% of his investments never got into black numbers (as is probably true for most startups)

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I hope that the last 10 people that work at twitter found an union, just out of spite