Our community has helped us pull in data from over 1100 sources to make amazing experiences.
The value of this is that you can build out anything you are passionate about. It creates some great niche experiences.
Maybe you want to look up who is in space right now:
Or you need to look up some NFL games:
Or you can't remember the details of that card from your Magic The Gathering deck:
We encourage people to build out the answers they want to see!
DDG has a lot of open source code on GitHub. A list mapping bang search terms to site URLs could be maintained as a simple text file on GitHub so contributors could test them or suggest improvements.