Head over to the Setup Wizard page and authorize the SocialAdr Facebook app. Then you'll see the Like buttons on the Share Queue page so you can start clicking them to earn credits.
It's typically based on the number of friends the Facebook user who Liked you has.
((ln(friends+50)^2)/3)-4
Example: A user has 356 Facebook friends and clicks Like on one of your URLs. You will lose 8 credits.
We also integrate with 3rd party services that provide Facebook Likes. When we are unable to determine the # of friends a user has, you'll be charged a fair number of credits (based on the average friend count system-wide).
It's based on the number of friends your Facebook account has * a multiplier that's related to your account type. For 'Free' users the multiplier is 0.1 (this is the same as when you share bookmarks).
((ln(friends+50)^2)/3)-4
Example: A 'Free' user has 356 Facebook friends and clicks Like. She will earn 8 * 0.1 = 0.8 credits.