Currently, you can get 4 credits very easy per day via viewing 4 video clip. When you have 100 credits, you can get a FREE 20$pass.
After login, click 20$pass link at the top of the page, and then click SuperSonicAds.
Then you will see a list of offer that you can earn credits with. The most easy one is to view video clip, each can earn 1 credits point. For 100 credits, you can get a FREE 20$pass.
The 20$pass can help you earn much more in Super Referral. Each 20$pass can gain around 8000-12000 points, depends on your luck. That is around 1 USD. That is login 25 days to view 4 video clip to get 1 USD. That is earn 0.01 by viewing video clip. Not bad!