All The Tropes Wiki Project

[Labster]

Yeah, but no one has surrendered their rights here.  Here's the entire barrier to entry for editing:

Being known on the wiki means that the software is aware of your wiki handle (user name). It reserves the use of your handle for you, and provides some services to known people that are not available to completely anonymous folks. Posting and editing are reserved for people 13 years of age or older. By posting or editing here, you are stating that you are at least 13 years old.
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You can also use this form to just set/reset your cookie on this machine, if you are already known. Put your handle and password in the boxes above and press:
Already Known. Just bake a new cookie.
Quick link to You know, that thing where ...
"Well, duh," you are thinking. "It's a user account." Not exactly. We don't bug you for an email address. Using this form is the entire process. We do need to put a cookie on your system, so you'll have to allow that. You will be logged in on the machine you are using now automatically, unless something happens to the cookie.

New works automatically come into copyright by their creators under the Berne Convention, under the control of their creators.  "As soon as a work is "fixed", that is, written or recorded on some physical medium, its author is automatically entitled to all copyrights in the work, and to any derivative works unless and until the author explicitly disclaims them, or until the copyright expires." (Wikipedia, CC-BY-SA).
TV Tropes is not the creator of the content on their site, nor have I granted them ownership of the content I personally wrote, so they have no legal authority to waive the rights under section 8 of the CC-BY-NC-SA license.  They cannot possibly offer more rights than the creator grants, without having first acquired the copyright from the creator.  One could assert other rights, like fair use, but that's obviously not coming into play here.
Honestly, I prefer the CC-By license -- here's the content, cite me, do whatever you want with it.  But since I can't just change the license from TV Tropes (and neither can they) without the written consent of everyone who ever edited, there's really only one possibility for the license on the new wiki.
-- ∇×V