If you have your own website you probably provide an RSS feed. If you want to give the users of Paper Pile a great experience while using your feed, there are several things you can do:

1. Provide as much text as you can. The more text you provide, the more it does look like a newspaper article.
2. Provide an image, if possible.
3. Do not mess around with RSS standards. Use it as it was planned to be used.

When the Paper Pile server requests the feed from your server it clearly announces itself as “Paper Pile”. If you do not want to publish as much of your content in general, you can change your server so that it only delivers extended content to Paper Pile.
If there are any questions left, especially about securing and abuse, don’t hesitate: mail me!

I am working on a solution which offers a way to provide exclusive content only for Paper Pile.