The content announcement of these scams was also given the lure that Facebook is doing self-protection against scam attacks from Sopa (Stop Online Piracy Act) and PIPA (Protect IP Act) laws.
Then, you are required to login to your Facebook account to the button that already provided. But after you press the button, then this scam directly will make an announcement to claim US$1 million coins and spreading news throughout your Facebook friends.