He gives the script to "6 motherfucking people" and one of them either sent it to a friend or someone in their circle of people took it. Either way, he gave up on the idea of making the film now that it's out there for everyone to read.
The Wrap describes the script:
The script is an ensemble Western with obvious parts for Madsen and Dern, as well as Tarantino stalwarts like Samuel L. Jackson and Christoph Waltz. Jackson and Madsen would likely both play bounty hunters returning human plunder to a town called Red Rock in exchange for hefty rewards.
Their characters, a former major in the Union army and a man named John Ruth, dominate the first two of the script's five chapters. They run into a Southerner named Chris Mannix on the road, and three of them, along with their driver — a living prisoner and three dead bounties strapped to the roof — arrive at a haberdashery to take shelter from an oncoming blizzard. Yet the proprietors, Minnie, Sweet Dave and her other colleagues, are nowhere to be found. In their place are four men, a Southern general (likely Dern), an alleged hangman, a Frenchman named Bob and a cowboy named Joe Gage. Mistrust, coffee and violence ensue.