these "DOSember Textart .blend files and .png renderings V1.0" are released in 2025 by
Dennis Busch (https://www.dennisbusch.de https://www.twitch.tv/dennisbusch_de)

under the following license:

Creative Commons Attribution-ShareAlike 4.0 International
This license requires that reusers give credit to the creator. It allows reusers to distribute, remix, adapt, and build upon the material in any medium or format, even for commercial purposes. If others remix, adapt, or build upon the material, they must license the modified material under identical terms.

https://creativecommons.org/licenses/by-sa/4.0/