It looks like I either pasted pre-an SRD update or somehow got mixed up, but the files will be amended later today with the SRD's current verbatim plus a clarifier:
This work is based on Ironsworn (found at www.ironswornrpg.com), created by Shawn Tomkin, and licensed for our use under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). The same license applies to Winsome itself.