I started a game on facebook. Post a picture on my page wall and someone, who shares this picture win my product.
This game is very famous, and over than 1500 people share the pic.
How can I export the list show who shared the picture?
Best regards, Gabor
When you access a object via the Graph API (e.g. http://graph.facebook.com/{object_id), Facebook only give you information on Likes and Comments. It does not show information on Sharing, so what you are asking is not possible.
You can try http://graph.facebook.com/{object_id)/shares, but it doesn't work, unlike http://graph.facebook.com/{object_id)/likes or http://graph.facebook.com/{object_id)/comments
In addition, it's against Facebook Platform Policy to "give away" something using Native Facebook functionality. That means, giving something away for Liking, Commenting or Sharing is not allowed.
You must not incentivize users to use (or gate content behind the use of) Facebook social channels, or imply that an incentive is directly tied to the use of our channels.
Also:
You must not use Facebook features or functionality, such as the Like button, as a voting mechanism for a promotion.