I have been asking this question for a long time, why does the forum allow the use of self-moderation in those topics where financial relations are implied? Why? As far as I understand, the impossibility of creating a self-moderated topic is only in Meta. But why not enable this option in all sections where financial relations are implied, such as Goods, Services, Currency exchange, etc. In fact, the entire Marketplace section.
I can't remember all the other boards, but I'm sure the auction board does not allow users to open self moderated threads, and as mentioned above, there are reasons why the privilege is disabled on some of those boards as it allows users to moderate their threads and prevent spam, although so many of the top threads (especially in the services section) does not use self mod option, as the OPs are highly trusted and any spam there would be easily noticeable as such.
There is also a notification of the number of replies deleted by the thread starter, which should serve as an extra warning to members.