I am submitting from time to time, and voting as well, but the overall quality of the submitted photos became disappointing.
There are still very good photos from time to time, but the voting system IMO became totally automated: photo reaches XX number of thumbs up = is included in one of the galleries... I expressly checked many times what is happening when I press thumbs DOWN (for photos not deserving to be included) and in many cases it appeared in the "recently added" gallery exactly after my vote... (this is why I'm sure it is just a matter of number of votes reached and proportion between them). Btw: Nowadays I never reach to the end when voting... and some times I spent more time on voting - just to see if there's an end
In the old times the last word was depending on a human (at least for the premiere gallery) and/or the proportion of the thumbs up vs thumbs down was way bigger...
Sadly PPG is no longer the site where one should be proud to have photos included. The premiere gallery for example is simply "closed" - I didn't see any changes there for years.
On the other side, the increasing number of submitters is good, Pentax is better known/sold... Ricoh could do something to keep PPG as a high standard showcase for photos taken with Pentax cameras/lenses (and using photos from here to promote the brand) - but in this form it is a little bit useless ...