cultiv8 writes "I am a developer and released some code at one point under GPLv2. It's nothing huge — a small Drupal module that integrates a Drupal e-commerce system (i.e. Ubercart) with multiple Authorize.net accounts — but very useful for non-profits. Earlier today I discovered that a Drupal user was selling the module from their website for $49 and claiming it was their custom-made module. I'm no lawyer, but my perspective is this violates both the spirit and law of GPLv2, most specifically clause 2-b: 'You must cause any work that you distribute or publish, that in whole or in part contains or is derived from the Program or any part thereof, to be licensed as a whole at no charge to all third parties under the terms of this License.' Am I correct in my understanding of GPLv2? Do I have any recourse, and should I do anything about this? I don't care about money, I just don't want someone selling stuff that I released for free. How do most developers/organizations deal with licensing infringements of this type?"