I'm somewhat okay at getting new members, though I feel it mainly depends on the niche of the forum. General discussion forums as well as promotional/admin forums seem to get more members more than specific niche forums like gaming forums.
Since I hide the core aspect of the forum from guests, the codes, and skins, I get new members pretty consistently. People register for what they want/need, and a lot of people want/need codes or a new skin for their board.
