I don't know why it's not on meta.stackexchange, but there's a post on meta SO explaining that there will be new guidelines for contributors starting January 1, 2016. Figured it's relevant here.
Starting Jan 1, 2016, contributions across the network will be licensed to the public under the following terms:
- Non-code contributions will continue to be available for use under the terms of CC-BY-SA
- Code contributions will be available for use under the terms of the MIT License
- You don’t have to include the full MIT License in your code base. Contributors agree to give code users permission to ignore the MIT License’s notice preservation requirement, as long as users give reasonable attribution upon request of the copyright holder (or Stack Overflow on behalf of the contributor). This optional exception to the MIT License will live in our terms of service.
What about other sites in the Stack Exchange network?
These terms will go into effect for all code posted after Jan. 1 on all sites in the Stack Exchange network.