Per the Wall Street Journal, of all things:
“Before and during Mr. Musk’s breakneck takeover of Twitter, a close-knit group of libertarian-leaning activists and businessmen have been encouraging him to get involved. This group includes the so-called PayPal mafia—former executives at the online payments company who include Mr. Musk, the investor Peter Thiel and entrepreneur David Sacks—as well as ancillary figures like the venture capitalist Steve Jurvetson, an early Tesla investor who once served on the auto maker’s board; and Mr. Musk’s brother, Kimbal, a Tesla board member, according to people familiar with the matter.”
Of course, this really isn’t all that surprising.
More at The Shadow Crew Who Encouraged Elon Musk’s Twitter Takeover.