All the fan-created 4e material on DTRPG is released under the terms of the Free League Workshop:
https://support.drivethrurpg.com/hc/...eague-Workshop
Notably, as I've commented elsethread before, the required copyright statement for every other Free League game line in the Workshop leaves original content ownership with the creator. However, the required T2k copyright statement omits that clause and seems to assign ownership of that content to Free League and GDW (ref:
screen shot taken 19 March 2022 for reference).
- C.