At the time of this writing, I've directly referred 34 members to List Bandit. I have over 125 "personal" leads. Because I'm an upgraded Flawless Diamond member, I get to mail to 2000 extra prospects with each mailing. The current referral bonus I have adds another 375 extra prospects with each mailing. With the first email I sent through the mailer, I received four sales.
The point of these stats is to show you that you can really use List Bandit to help your list building efforts. It can help by providing you with bonus prospects in addition to the members you directly refer. There's also the Bandit matrix, which is rebuilt every day and gives you access to random members.