User blog comment:Sirin of the Void/PE Permission/@comment-36128243-20200122161116/@comment-24097388-20200122223859

From what I can tell, it seems to be users who have been a part of the community for a year and over and have been here as an active member editing, rather than simply be here for just PE blogs. So I guess as time goes on for them, more users will be added if the admins recognize them as a trusted community member.