Quote:
Originally Posted by xyzzy_foo
Also, DeDRM doesn't have a valid license, which means that implementing its code in proprietary apps wouldn't lead to any license violations (since it's not copyleft).
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Irrelevant. It's still copyright, and so called copyleft is simply copyright where the copyright holder gives up some rights. Copyright works can be free. The GPL, Apache, BSD and CC "licenses" etc are just predefined copyright relaxations by the rights holder.
When a work is created it's automatically copyright. No need for USA registration either. Ultimately works are either copyright or public domain. A rights holder can put a disclaimer that it can be copied, or can be copied but not commercialised, or can be copied, but not changed, or can be copied, commercialised or changed.
A PD work can can copied, changed, commercialised etc. The Project Gutenberg Licence is really fiction.
However a work derived from PD is copyright in terms of layout and any additions or changes are copyright. A work distributed from copyright work with rights relaxed by the holder can't change the original holder's reserved rights and can only be derived work if the original rights holder allows.
Epubor up till now seem to be parasites.