“Points can be bought in your Account, can be given to you as part of your membership or can be earned by selling content Items or being active on the site.”
How can I sell content Items and be active on the site so I can earn some points?.
At present it is difficult to earn points by selling content since people tend not to take content which cost points. We think this will change in the near future when we make some changes. So for now, just get active and follow the changes at the site. That is my suggestion.