I have written several guest blog posts for a website with a large readership. I didn't ask for payment because the site is set up primarily as a public service in the special interest area.
Now I have written a guest blog post that I would like to re-use (possibly in a slightly different form) in a future book. I have asked the site manager about this and find her response confusing. First, she pointed me to the site's reprint policy, which says
"articles cannot be reproduced for resale."
She also said, "Your writing will always be your own intellectual property - even if it’s published on our site."
Should I request an exception to this in writing before my article is published on their site?