Adsense Referral Ads: Earn extra

This is a very unique feature of Google Adsense.You can choose any Ad ( irrelevant ads also work here) and publish it onto your website.These ads are a bit different from the common Pay-Per-Click type of ads.Best thing about referral ads is that they return very good results in terms of revenue earned.On an average, you can earn upto $1-$2 per click( pretty good).In best cases you can even earn upto $25 per click( that's interesting!).

When a visitor clicks the referral ad, he will have to complete the further process.It generally includes form filling, signing up, joining the company etc.You may earn nothing inspite of the fact that you have got clicks, because the visitor has not fulfilled the advertisers demands.
The referral ads are totally under the control of us.We can choose which ad is to be displayed, of what size etc.
An example will make it simple:
A bank wants to get customers for their insurance plans.They know that once the customer joins they will earn average $400 profit per year per customer.So why not pay $20 to one who brings you the customers.
Similarly, the social networking sites need members and hence are ready to pay $1 to the referrer.

Try these ads with different formats (Text formats work better).These ads will surely bring up extra income from your site without affecting it's design.