I don't usually do this - write a post that just directs you to go and read something else - but I'll make an exception for this one because anyone who writes
"My field of expertise is complaining, not answers. I know there’s no
point in demanding that businesspeople pay artists for their work, any
more than there is in politely asking stink bugs or rhinoviruses to quit
it already. It’s their job to be rapacious and shameless."
deserves it. Tim Kreider, writing in the New York Times on why writers should (almost) always refuse to write for free. With the added bonus of a template 'No' email you can use to turn down such 'offers of exposure' as the offending people consider them. (Not as shouty as the Harlan Ellison video.)