Welcome to auction cut forum. Good to see that you came here for a good subject. I agree that you must post some good material to get a valuable signature and once you get that signature then its up to you how you manage to get benefits out of it.
It's great to see a new member among us here. Looking forward to reading more posts from you!
A signature with a live URL to your site to another potential traffic source. Especially if your inputs are well put together and all in all helpful to the community - its a sure fire way to direct more traffic to your site! So as James said "ts up to you how you manage to get benefits out of it.":)