I run a free forum but would like to prevent people from joining just to place an ad. Is there any way to configure it so that a new member has to have "X" number of posts before placing a classified ad? This is integrated with VBulletin.
If its integrated with vbulletin hmm well set permissions that registered users can not post ads and that the special group your vb is throwing them into to be able to post can post ads that should do it.