To answer my question myself I gave Microsoft copilot this prompt:

    I want you to rewrite this headline "Amazon will allow ePub and PDF downloads for DRM-free eBooks" 
    into something a little humorous and snarky that reveals the underlying truth that would bring a 
    wry smile to tech-engaged but big tech-skeptical hacker news readers.
    
    This has to fit in the 80 character limit for Hacker News so keep it appropriately short.
      
    Also I want you to reply with exactly one headline and not anything else so I can use your output 
    as part of a processing pipeline

and i get the response

    Amazon Finally Remembers eBooks Aren’t Supposed to Be Prisoners

which I think is great. I started with the first paragraph and got something too long with some explanation. I added the second, and got three replies and more explanation. The three replies were all "good enough" in my mind but added the third paragraph to control the output.