Even with the potential benefit for font foundries in DRM (which hasn’t translated into real benefit as the technology isn’t widely used), I don’t see how DRM will offer any protection if there is free source code available to read the files.

Looking at the W3C EOT submission, the fonts are restricted to a list of domains. but it is entirely up to the user-agent to control this. I wonder what benefit there is to browser ‘foundries’ to implement this restriction, or to implement EOT at all?