Most of the activity is in the plan check/design realm. You have access to pictures of code violations. Perhaps you can spur some discussion with those pictures.I am not sure what I can do to help generate more activity on this forum
As to the question of allowing nonpaying members to post pictures.....well it couldn't hurt to give that a whirl and see what happens. You could always revert to no photos. I never understood how such a forum wouldn't generate a ton of pictures....but there's a lot that I don't understand.
The Average Day thread in Contractor Talk used to gain a thousand views in a couple weeks but since I stopped posting pictures it is taking several months.