It already happened many times, there are some cases I know about where the developers themselves acknowledge the work of people of the Xnalara community. One of the cases would be with the Creator of the program (which was originally created only to support and pose models from Tomb Raider series) he developed the program…
Considering that you can sell artwork through their system with a simple click on the button, on which they reap profits, I would say yes. Which is why most, if not, all self-respecting sites put regulations beforehand and manage the system better before all this. DA still doesn't have a proper report system believe it or…