Shumi,
I found your post to be a valid criticism point and quite worthy of being posted here at the time that I read it, although I can't remember what your point was about already as of now. What you need to realize is that UC is an actual paying customer of Agoracom who is paying Agoracom a fee to promote UC, not just another bulletin board member being followed and controlled by posters. As such, Agoracom is paid to help promote UC as a compnay. Therefore it stands to reason that a paid sponsor cannot allow too sharp of negative publicity from this site or UC will go somewhere else to pay for promotion representation.
You will find that valid critisism is much more tolerated on non member sites within Agoracom. Hope that helps in your understanding of the removal of your post.