Established members are members that have a few extra features because they contributed something useful to this site. It's actually not hard to become an established member, but it does require some minimal effort.
Has posted at least 30 post/replies
Has posted at least 1 thread/topic started new!
Has been registered for at least 30 days
Maintain to keep your account on Established Member status:
Has posted at least 5 post/replies last 30 days
Has posted at least 1 thread/topic started last 30 days new!