I wanted to add your mod into https://mods.factorio.com/mod/zk-lib but your mod doesn't have a license actually.

Thanks for your interest.

The functional contents of this mod are trivial and not worth license considerations.

While overly centralized control is a nightmare, we need to go back to the days where copyright was applied to works upon request/registration (with modern systems for doing so) rather than as an automatic restriction with de facto selective enforcement.

I have chosen a new(?), more appropriate option from the selection on this site.

Um... If I understood you right, that licenses must work with policy of such system in the case?

I added your mod into https://mods.factorio.com/mod/zk-lib