If there's a lesson here for the HN community I think it's that there's more than one way to do things. You bristle at the idea of punching a clock and accounting for your time in 15 minute increments. So you shouldn't work there.
At the same time there are surely creative people out there who bristle at the idea of working through the night or on weekends. To those people a workplace that closes at 6pm and enforces a no-work policy after that would be appealing.
The beauty of this article is it tells us both ways work. So people who want to close down at 6pm can start a company and draw other like minded people to them. While people with no interest in that lifestyle can stay away