here are some posts about online communities that I find very good for one reason or another
(Not a full list, no particular order, mostly from the running list we keep at @capiche. screenshots in this thread are their quotes, not my notes)
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I was at Amzn early '00s when we lost 95% of our market cap. Later at FB I negotiated a down-round in '09, and then in '12 our stock dropped 50% post-IPO. I was on the board of a public company that went bankrupt (Borders) and a start-up that went under (Hello). Some lessons: