I was trying to keep my initial post useful but brief. But I now see I left out a couple of important details. So to add:
Writing in an important part of the gig, but the majority of the writing is print ads, direct mail solicitations, business communications, and similar things. Knowledge and experience with freedomista issues is needed, but the majority of the writing is business-related, not op-ed.
Experience in advertising or related fields is crucial. The client needs somebody who can not just execute projects, but give reliable advice on how to appeal to an audience, create effective offers, make best use of a limited ad budget, etc.
Thanks again,
Claire