I’ve just updated my “Availability for Interviews, Appearances and Writing Work” page with the following paragraph:
First, a general note regarding both fiction and non-fiction: I do not write for others without being paid. This is my job. If you cannot pay me to write for you, do not ask me to write for you; you’ll be wasting my time and yours. Requests for non-paid writing will be deleted unanswered.
Because people needed to be reminded.