Why open source over proprietary solutions?

At a time when organisations were still wary of adopting open source, why did Dish TV choose to adopt the source model (over proprietary solutions)? “The overall cost benefit by deploying an open source system is much higher when compared to any proprietary solution. Scalability and stability of OSS is now proven in the industry, worldwide. Plus, we get the flexibility of fine tuning the system to meet our requirements. Open source systems do not limit you in