I found this out when I needed money for iZone. It's basically something like App Trailers but it's easier to get points. Apps come in each day if you run out.
You can get amazon cards or iTunes cards.

Here is the link if ya want to support :
http://m.freemyapps.com/share/url/a78a9e52
if you don't want to support
m.freemyapps.com