I honestly can't imagine a fan writer ever being offended by cover art or pod fic of their work. I wonder if there's a list of people who would definitely like cover art like there is a pod fic list.

I didn't even know there was a tag for "cover art welcome."

My fandoms are tiny so I'm not asking as I'd like your work to get greater exposure and that comes with doing this type of fanwork for larger fandoms.