I send an email to the creators of freebies that I use and have only recently done the same with purchased items (which isn't easy with DAZ items since the readme does not provide an email address for the creator). With well over 10,000 downloaded freebies over the years and a picture output of a little over a dozen images, I haven't used very much of the content I've downloaded. Just because I haven't gotten around to using somebody's particular freebies doesn't mean that I never will. All the freebies I've found are very much appreciated. Of the people who have posted to this thread, Trekkiegrrl's balloon is the only one I've used and I did send her an email letting her know about it and she did comment on the image.

Right now, I've gotten back into boardgaming, so Poser has been pushed to the side for a while. I do think I'll be designing a boardgame map using Poser and other 3D freebie models and shaders. When I was looking at the map for the freebie miniatures game, Zombie Plague, I quickly thought that I could make a much more realistic and moody map using 3D content. While the map at the end of the below PDF has a certain homemade charm, it's also a bit too cartoonish and amateurish.
http://www.fortressfigures.com/zombieplague/

My visual indexes of Poser content are at http://www.sharecg.com/pf/rgagnon