I think DRM obviously helps do the job of curbing piracy, but I don't think that crippling software is really the best solution to the piracy problem. It's like treating the symptoms. In the end it only makes the problem worse, as people get disillusioned and don't want to support the company, etc. The World of Goo dudes took a necessary first step in the right direction. Innovators are going to suffer a bit at the beginning of the process (especially if that 90% figure is correct), but it'll get better in the long run.
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