The Ninth Circuit's recent analysis in MDY v Blizzard Entertainment examined contributory/vicarious ("secondary infringement") copyright issues, the "essential step" defense, the important and often highly disputed contractual covenant versus copyright license issue, and last, but certainly not least, the DMCA's role. I recommend you read the full opinion to gain the complete picture, but for this post we'll be focusing on the copyright covenant vs. copyright license issues and touching on the DMCA's role.