Unlock Content with Stumbleupon
<p>I've worked with unlock (perform an action to view content) scripts using Facebook, Twitter etc. I was wondering if anybody knew a way of accomplishing this with a StumbleUpon like.</p>

<p>I can't seem to get my head around it, any help would be very much appreciated.
It seems they do have a working API: <a href="http://www.stumbleupon.com/help/business-tools/supr/supr-api/" rel="nofollow">http://www.stumbleupon.com/help/business-tools/supr/supr-api/</a></p>

<p>Thanks :)</p>
