It could be as simple as putting up wanted posters regularly, with information about who, what, where and dirty details.
I am willing to bet a lot of these adventures would be available from the fan base, should the gaming companies facilitate the process. Yes, this would incur some overhead on their part to review, edit and format the material, but nearly as high as paying staff writers from the get-go.
Best product line support I can recall was Black Industries support of Dark Heresey before it was taken away from them. They had new material on the web site weekly. It didn't have to be huge amounts - an NPC write up, write up of a new location. Roughly monthly they put out a new adventure consisting of a half dozen to a dozen pages, a map or two and the NPC character sheets.
I have to agree with the OP. I have the money to pay other people to do the setup work for me, I just don't have the time. I would be curious as to what the market share is currently for P&P RPGs. I am guessing it is moving more and more in that direction.