Thanks but in that case all titles of level 3 category will be showed and we don’t want to motivate users to post here and there just to keep lvl 3… We want to motivate intrinsically not from desire.
I browsed and moderated in a couple of communitys from almost 15 years ago (and worked as admin in some of that, old software and very limited skills in coding but sharing ideas and a lot of will) and I think that show only pinned posts is a good implementation.
Not peek-a-boo game, you know.