A huge reason the 360 has seen decent sales is that you can pirate the games. Publishers of games, movies or music are interested in choosing a media that is the most secure against piracy. If HD-DVD was “crackproof” and Blu-Ray wasn’t then Blu-ray would be lost and vice versa. It’s all about them dollars, and for a format war to win it need to have the content and backing from the studio’s (Blu-Ray to win)”]
Source: https://gizmodo.com/blu-ray-copy-protection-cracked-disk-copying-software-316852