Over the years, I've been convinced that indie developers should not really focus on DRM, focusing on paying customers. Also over the course of several years I've also suggested quite a few times in the business forums that indies should even consider intentionally releasing their games on piracy sites, possibly with added in-game ads or other incentives to legally purchase the game.
Looks like somebody finally did that with an added ironic, and very beautiful, twist.
A game studio called GreenHeart Games developed "Game Dev Tycoon", a game where you run a virtual software development shop. They released it DRM-free for legal purchases.
They also seeded a special build for pirates. In the pirate-released build, the virtual game dev studio does well for a while and then starts to have their products get hit by piracy.
The studio's blog post is one of the best things I've read all year: http://www.greenheartgames.com/2013/04/29/what-happens-when-pirates-play-a-game-development-simulator-and-then-go-bankrupt-because-of-piracy/
Reading the forum posts where game pirates complain about piracy and ask for new forms of DRM is just incredible.