@MLClark They won't pay the writer, yet they'll gladly pocket any revenue they derive from your work's publication.
That was a lesson drummed into me by JMS, Harlan Ellison, and David Gerrold. Act like you're worth it.
I've been approached from time to time by people who wanted to compensate me with "exposure." I told them to eff off.
And then there were those who stole my blog content, but that's another story ... π