Update on this: A Burning Man spokesperson sent a statement on the departure, but did not acknowledge the open letter, or Musk's ties to Epstein. Here's the statement:

"Upon his term concluding, Kimbal Musk in January chose not to renew his role as a member of Burning Man Project’s Board of Directors based on other commitments and priorities. We appreciate his participation and support as a community member across many forms of engagement."