Playgrounds allow users to operate the system in a simulated exchange environment. They can experiment with its controls and better learn how it behaves.
In addition competitions may be beneficial with encouraging users to sharpen their skill on the system. Playgrounds and competitions can be used to build up a community around the system and maybe even promote it within a wider community.
Playgrounds and competitions can be built into the environment simulator allowing the system to be used or the system simulator to focus on accurately replicating the system’s performance.