Earn By Selling Your Signature.

If you post a lot on forums or message boards, then this work is easy for you and you will earn extra cash. Almost every one who owns a blogger or website knows how important it is to join a forum to drive traffic into your blog. You just have to put your blog or site’s URL in your signature and start posting comments, replies, etc. and you see lots of traffic flowing into your site.

Selling your signature is good way to earn money. Most advertisers will pay you to put your signature online. All you need to do is have the business firm's web address, link, or advertisement placed after your signature and then you must reply to the required number of threads.

Sig-Link is one such site that will pay you for forum signature advertising. You must first sign up for free to be a registered member.
Once you have registered simply login to your account and click on the "Sell" link. The first thing to do is select a general category for your item, note that you can choose a more specific category further into the listing process. You can then enter in your chosen settings and item description.
In order to sell you have to first place a bid on an item that suits to your forum category.

Visit SigLink FAQ page or Home page for more details.

SigTrader is another such platform for forum signature advertising. But unlike SigLink you don’t have to place any bid on the items you want to sale, rather you set our own rates and wait for advertisers to contact you. (I’m not a member of Sig Trader as there were some problems while signing up but would love to receive feedbacks ( positive or negative), if any, about this.)

Payment| Paypal, Cheque/month, others.

Visit SigTrader how it works page or home page for more details.

Personal Experience| There is just one major drawback for this. Since this concept is relatively new there are few advertisers/ buyers who would want to purchase your link. But this is an effective way to promote any item and may be future more advertisers will be attracted towards this.