I dont understand it either. I'v only been in the group a week and I commented on two pictures.
Is it because of  comments made in this thread about  pieces put up realy quickly dont deserve commenting on? I think the main objections were to the attitude of  "I dont realy care about the image I've posted"   which results in the viewer thinking "I dont care either, I wont comment".is that what you feel about yours?I doubt it. Based on the reality that people still commented on your posts, clearly they didnt mean you. 
Some people plan their work in advance, some let it flow. My paintings quite often have a life of their own. Sometimes I just splash some colors on paper,  see what the shapes suggest and continue from there. Room for all of us.
I hope you change your mind

"I paint that which comes from the imagination or from dreams, or from an unconscious drive. I photograph the things that I do not wish to paint, the things which already have an existence."
Man Ray, modernist painter
http://artpearl.redbubble.com/