.@bhorowitz on how a game studio turned it's last $6 million into Slack: "Stewart calls me. He says, 'Ben, I've got $6 million left. I have no way to raise money because I've made really no progress. So I've got three choices. I can pray for rain and try and finish it, I can shut down the company and give you your $6 million back, or we built this tool that we use in our engineering team to communicate with each other, and I could just put that out as a product.'" "I'm like, 'What? You just…