[Addile]

And that's where I don't fully agree. There are many projects licenced under "GPL v2 or later" and they don't need copyright assignment. Copyright assignment is huge and opens the door for way too many legal stuff.

Also Copyright is a pretty US thing. Law differs and many Countries don't actually allow it. Also since you brought up Getmany already: https://en.wikipedia.org/wiki/Copyright_law_of_Germany#Trans... Germany is such a country and even if you were to assign copyright to them it would be legally void to the best of my knowledge. And also other countries that base it on moral rights.

Copyright law is very different between countries and way too strong to just transfer for such a use. If they really wanted to, they should have made a license to handle it exactly the way they wanted.

[cyphar]

The problem is that in order to have the ability to register their copyright and do meaningful enforcement actions in the US, they need copyright assignment. Copyright cares about authorship, so if they don't have "authorship" (read: own the copyright) then they have very little power to enforce the GPL.

Some other people argue it's not necessary, and while that might be true, it's better to be safe than sorry. Not to mention that all GNU projects are GPLv3-or-later anyway (so any contribution would be able to be upgraded anyway since it's licensed in such a way that you can use it under GPLv4). If you refuse and license your change under GPLv3, it won't get merged.