That's not really the issue, though. If something is under a non-copyleft license such as an MIT or BSD-style license, the original is still there and can be forked into an open continuation if the community is prepared to do so. Obfuscation hinders this, regardless of users nominally having the right to do it according to the license. I don't see how GPL protects against this except in the same sense that it "protects" against e.g. the Artistic license.
Originally Posted by sylware