You made a great site. Perhaps it is good to put additional options on making pictures (those who are not designers do not know how to arrange images). That would bring at least 300% of new users. 
Automatic voting is good, but there is a problem with automatic comments. You can not solve this with the software. But automatic greeting cards for birthdays, for religious holidays and weekends - that would be great. 
To make voter statistics by time zone. When is it best to put a post for my audience? It's also a great strategy that will bring you new users.

  @mahdiyari