Up at rigth, you can see white button My Center. Inside, you can see some buttons. In "Task" you can earn each hour 5 gold coing pushing in Everybody bonus. When you got level 1 or more, you could earn gold coins acording to your level each hour.
So find a page on this site and share it to your facebook. After a week screenshot the post and post the picture as a reply to the thread then a moderator will check how well your post went (if you got any shares and likes) and then they will award you gold coins.