Paulo Coelho, author of The Alchemist, has pirated his own book and subsequently increased his sales by an astronomical amount. This is a news story you can find here
The linked story tells more in-depth about it and it also has an embedded video of Paulo Coelho giving a keynote speech where he discusses how pirating his own book increased his sales. The video is over 90 minutes long, but only the first 20 minutes is Paulo's speech. The story gives a good synopsis if you don't have time to watch the video.