Meh. I've only read some of this, but here's my response, which I shall keep short.
1. None of CA's coders have posted a public answer to Smoth's public question, which, along with several other events over the last year, lead to my decisions here.
Personally, I think you guys should either defend your policy in regards to license a bit better, in light of how many projects wish to use your work, but are legally limited by the GPL's copyleft provisions, or use a looser license, as AF has repeatedly and reasonably suggested. I think that if your real goal is to just make fun stuff for people to use, CC-PD or CC-SA is the most appropriate license.
2. In light of all of the arguments of various kinds about my specific analysis of CA's legal status... here's my response:
If I'm
completely wrong, and I've mis-read that blunt statement from the FSF's own website, and you
can apply the GPL to code in CA,
without being in violation of the license:
Does that make things better, or worse, in regards to my more serious philosophical arguments about what we're doing here, in terms of releasing source code, and whether any given license strategy will help, or hurt, the goals of the overall project?
IOW, does a copyleft license, on gamecode intended for wide usage, help or hurt people making games, especially games that they want to keep private? If that answer is mixed, who's it hurting and helping? Does this matter? And if it matters, should it be examined and changed to achieve other policy goals?
Quit chasing your tails, or trying frantically to find a way to stab me for pointing out some things that have become increasingly obvious to the more thoughtful people around here. Most of the arguments, past the early back-and-forth tennis match with Det and KDR, just looked like a bunch of people wanting to avoid the serious issues here.
I certainly never said CA's a bad project. I respect most of the people working on it, even though I don't know them terribly well. I would like to think that the grownups among them understand that this isn't some stupid plot to destroy them, because to be honest, I don't think there's any point in destroying them, and if they weren't using OTA content, I would happily help them.
So, personally... I think it's completely irrelevant whether we talk about whether it's a "game" or a "mod", etc. All of that is totally beside the point.
I made some very specific, narrow arguments about law. Not about the project's members, intentions, goals or the merits of their game design. KDR's been releasing giant reams of seriously-interesting gamecode for months, under PD, and I suspect that's in large part because of these issues. Anybody who hasn't fired up THIS is an idiot. Full of good stuff. And it can all get used by anybody, for any reason.
But, alas, KDR hasn't written complete code that duplicates or improves upon the key gamecode functions in CA.
So... I've gotten multiple PMs about this issue over the last 6 months, including one that was a carbon-copy of Smoth's public statement, from various parties wanting to know what was up. This is my attempt to try and clarify things a bit, and frankly, I don't think that self-denial of the facts will help anybody at all here- clarity would be good. Nobody thinks that CA has bad intentions. But people can change, and stuff can happen.
At the very least, if CA wants to allow for non-GPL uses of their source, they should at least
read the GPL, which it's obvious most of the devs have not bothered doing... and provide a formal Exemption form, properly filled out... which, btw, is a requirement, if you want to let people out of GPL.
You can't just say, "it's all right, we swear we won't sue you", like you did with Fanger, in some Forum post which may get lost, edited or deleted. Oh, and btw... if you want to provide an Exemption, all parties must give their consent. Not just the last guy who touched it. You all have copyrights to that work now.
Go read it... if you're going to use it, do it
properly 
Don't just tell us that you're all hippy idealists who think ideas should be free. If you're serious about using a copyleft license, hey, that's fine with me... but that means, among other things, that you should be making a game that can have it applied... telling violators they cannot do that... and otherwise upholding the license. Because a license that isn't upheld and defended when you're notified of violations is probably not defensible, either, at least here in the US.