and some seems like are not ( from your advice here to me )
who and how people decide which newbies can be accepted to open that kind of topics?
*edit: i see also "merit" under my activity, what is that
no one should be locking a post without replies. If you're below a member rank or have negative trust, you can expect to require some negative trust.
Scams aren't moderated by moderators but they may delete some topics if a scam looks obvious to them or has a very high chance of being a scam..
If you don't self mod and don't lock your topic then you'll be fine.
I think some members of higher rank and that are trusted self mod and lock topics without replies which isnt considered untrustworthy (it might limit how many people can respond to them though - eg newer members can't send many PMs a day).
Merit is a score that helps you rank up: https://bitcointalksearch.org/topic/faq-everything-you-need-to-know-about-forum-activity-account-ranks-and-merit-2766177