Does Google guarantee revenues?

Since the revenue that you may earn through Google AdSense depends on the content of each of your webpages or the search terms entered by your users, as well as the availability of related Google ads, Google does not guarantee that you will earn any revenue amount.

How do I sign up?

To get started with either AdSense for content or AdSense for search, all you need is a website that complies with our program policies. If you don't have a website, you can create one using Blogger or Google Page Creator (English only).
Once you've ensured that your site complies with our policies and are ready to join our program, just submit an application. Then, check your inbox for an email from us to verify your email address. After you've verified your email address, we'll review your application and follow up with you via email within 2-3 days. If we approve your application, you'll be able to log in to your AdSense account and get started.

AdWords advertiser can sign up?

Yes. We're excited to help you find yet another way for you to increase your revenue and encourage you to submit an application.