Google AdSense is now offering $100 bonus for referrals who reach $100 in earnings.

With our new referrals feature, you can increase your revenue while increasing your users’ awareness of useful products and services. By adding a referral button to your site, you can direct users to sign up for AdSense and monetize their web content, or to download Firefox with Google Toolbar and improve their web browsing experience.

While your users learn more, you can earn more — US $100 for every new AdSense publisher who earns $100 and up to $1 for every new Firefox user.

If you also want to earn money with your website, just click the Google AdSense-banner on the right.