Garry Tan says turning down Peter Thiel's early offer to join Palantir was a $2-4 billion 'mistake'

Y Combinator CEO Garry Tan said he turned down an offer to be on Palantir's founding team. Bloomberg/Getty Images Garry Tan said he once passed up a role on Palantir's founding team to stay at Microsoft. It was a "$2-4 billion mistake," he said. He learned not to chase "what was hot." Tan eventually joined Palantir as its 10th employee. He now leads startup accelerator Y Combinator. Garry Tan was employee No. 10 at Palantir. He regrets that it wasn't single digits. On "The A16z Show," the Y…