I am a newly contributing author (i use the term loosely) and have had the same things happening. It really hurts the readers in the end and heres why. In my case being new to this i wasnt sure if the stories were that great and wasnt sure i wanted to submit more of the two dozen stories i am sitting on. I was waiting for people to let me know. If more people took the time to say something one way or another just once in a while more stories would get submitted by people like me. I think if they allowed anonymous feedbacks more people would do it. i think folks may be afraid to say something because they dont have stories submitted to qualify their remarks. Maybe they think people will pick on their stories in return... I think anonymous feedbacks would solve alot of this.