title: Discount for Twitter or Facebook post
body: <p>Create a pricing discount for users who post a pre designed message to facebook or twitter. </p>
  
  <p>Is there a third party solution?</p>
  
  <p>Any help with the any of the steps generally outlined below would be gratefully received.</p>
  
  <p>from payment page:</p>
  
  <ul>
  <li>open twitter/facebook login (allow customer to login)</li>
  <li>automatically fill post with pre designed text</li>
  <li>let customer press post and receive authentication that they have done so</li>
  <li>re focus browser to payment page in some way (close fb/twitter pop up)</li>
  <li>update payment page to include discount if correct response is received</li>
  </ul>