We have made galleries from when we first started it this business. It has been our base to get where we are now.
But lately I must say that it takes more than just posting a gallery and wait for the signups to roll in.
A "normal gallery" like
http://www.love4fetish.net/mature/1502.html
is normally good for a few signups, but if you put some effort in it like
http://www.nasty-fetish.net/lesbian/11/ then the ratio is way higher. 8-12 signups is almost normal when you make them special.