Know what to OpenSource

Open-Source has been successful, it does not mean everything should be open sourced. Careful criteria for adopting a strategy for maintaining the project should be put in place to decide it. These criteria will depend upon your product plan. Open-Sourcing can take the project in unintended directions and hamper the product plan. There are many project maintainers who have come to realization that their project was not ideal for Open-Sourcing at the time when it was done.

However, adopting open-source practices even if the code is developed internally should always be a good option to consider.