Some self moderated topics are indeed used for scam purposes, other times it's used just to cut down on spam.
If you don't like the topic, you can create your own, non-moderated topic about the site or product and then people can talk in that thread without being censored for voicing their opinions. It's happened a couple times, for example there's a topic with over 1k pages in the Service Discussion area dedicated to an uncensored discussion about GAWMiners.
PS : Bolded part done by me
im not accusing someone of having ill intention but that could be the case, it happened to some, hope it dont happen to the thread that
deleted your reply espringe