A large section of customers are not part of the various "communities" and do not post in forums nor in online galleries.

Another section of customers do not post in online galleries due to the ripping of art and copyright tubing going on.

I only have 2 images in my gallery and both are natural media hand draw not poser art.  Once your art is claimed as someone elses it's hard to share by posting to the online galleries anymore, least that is my reason and experience.

Then there are just the Poser collectors that buy and never unzip or render at all.

Better to have sales then no sales at all, least ya know people are liking and buying.