Vidcoin is a neat GPT software with integrated Virool offer wall and Bitcoin payments.
It has a Facebook login API attached to it. In fact, it’s the only way to authenticate a user and I believe it’s the best way to easily reduce fraudulent activity on your site, because people use their own identity to watch videos (complete offers).
You can of course block access to whoever you think is up to no good etc.
Edit of 2019
This script is a big nope. Ever since Virool banned all incentive traffic it has been completely useless. Then Facebook updated their user authentication and it fell apart. I never got around to fix this so we can pronounce this project dead I think.