A week ago, Apple introduced 14-day no-questions-asked refunds in the EU for iTunes Store and App Store content. This means that, without the need for a reason, any Apple customer in Europe can get their money back for (primarily) app purchases in 5-7 days time. That’s how it is described, at least.
This opens up some possibilities for abuse. For instance, if you complete a game within two weeks, then you can get your money back and end up paying nothing. As a developer, I tested this out myself. It turns out there is an even bigger problem. At least, right now, when the refund is processed, the app continues to work. You get the app for free, forever.