ethics of marketing?

http://www.worldmag.com/2014/03/unreal_sales_for_driscoll_s_real_marriage/page2

Where do you stand on this as a christians?

I think it is a shame that his books are not legitimately on the best sellers list. Buying your way on the list is pathetic. What it tells me is that Driscoll's book can't sell itself because the info isn't legit, or Godly.
If Mars Hill had $210k to spend on promoting a book, I wonder what they spend on missions and helping those in need? Most churches would flip out if they had that much money to spend frivolously.