The article discusses the failure of NYCTrainSign, a company that produced IoT countdown timers for train arrivals. The author acquired one of the signs and investigated the reasons behind the company's collapse, finding issues with the product's engineering, pricing, and business strategy. The author also discovered security vulnerabilities in the sign's software and was able to take control of the company's domain and exploit the signs. The article provides a post-mortem analysis of the company's mistakes and the lessons that can be learned from its failure.