DRM is not just a strategy to protect revenues. Whether you agree with it in that role or not, it comes with a toxic side effect. Because digital locks persist indefinitely, they continue to apply even after the content they are withholding is no longer subject to copyright. Instead of entering the cultural commons, DRMed works remain inaccessible.
Thus DRM robs the future to make a fast buck in the present - that's why we have to fight it, especially in web browsers. I explain in much more detail in my post marking the Day Against DRM today:
https://meshedinsights.com/2017/07/09/drm-is-toxic-to-culture/
