Whether you create photographs, music, written works or whatever, if someone wants to use your work they need your written permission to use it and you should be paid for the use of it.
If someone uses your work without your permission they have committed copyright infringement
It’s funny how the infringer, caught red-handed, attempts to defend his thievery. Not only does this editor infringe the writers work, the editor doesn’t seem to think twice about ethics when it comes to plagiarism.
The editor knows he did wrong, that’s why he pays up.