The sandbox doesn't collect click data, so your test publishers won't accumulate click data. There is a demo publisher account that will allow you to test the reporting service. The publisher account's email address is "testsandboxpub@google.com" and is associated with the developer account you were given when you filled out our registration form. To send requests you also need this publisher's AdSense service id, which is ca-pub-1744271982572164. This id may change from time to time, so if you're experiencing problems, check back here for the updated information.