From your topic do mod now give preferential treatment to some users like senior members than the newbies? Maybe newbies are restricted as a result of an abuse of it.
To an extent newbies are restricted, because due to the ease of creating an account on the forum, spammers and bots can scale through and post on the forum, this group makes up a number of new members. Forr this reason, posting/pm limit is reduced and newbies are restricted from joining campaigns.
This does not mean they are less preferred, any member who joins the forum for the purpose of learning would not be bothered about the restrictions, which reduce with time and increased activity.
I've not noticed any abuse against newbies, since newbie jail was removed the admins has made efforts to make the forum welcoming to newer members. Maybe more merit sources in designated boards are needed as well as the newbie welcome message, but there's no stringent restrictions.