SAN FRANCISCO (Reuters) - Around midnight on Christmas Eve of 2009, a handful of employees at Twitter received an unconventional holiday greeting from Dick Costolo, then the chief operating officer.

Podcast host Joe Rogan praised Elon Musk on Monday, saying the billionaire “changed the course of history” by buying Twitter, ...

But hiding beneath that nice problem is a whole viper pit of nasty ones, as any study of Twitter history will tell you. What did Twitter do when it was in this position? In a word: nothing.