Link to the source code? (iirc, it isn't open source, but probably the extension code can still be examined)
The comment(by a competitor) says that DNTMe sends back data, but neither the comment nor the areweprivateyet.com website backs up that claim. The latter just says that DNTMe is not very effective at blocking.
Since you mention that they sold out, I hope to know if there's more history on the subject, if things changed in the extension, or with Abine, and when that happened.
Actually, it is open source, because Abine copied GPL code into their add-on, making them subject to the GPL. They're using some of Moxie Marlinspike's code.
Download the DNTM add-on source. Do this with Chrome; Firefox will try to install it into the browser. Change the suffix from .xpi to .zip and unpack the file. Now you have the source.
Take a look at "components/common.js". ("Copyright (c) 2010 Moxie Marlinspike; This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.") Towards the end of that file, there's additional code from Abine. To read it clearly, put it through a JavaScript beautifier.
Now take a look at the code around "parseIdentity", which involves creating a unique identity for the user and sending it to Abine via XMLHttpRequest. Notice the places where it builds up JSON items and sends them somewhere. Also look at "protocol.js", which implements the "Abine protocol". There's more, but that's all I have time for right now. I looked at a previous version in more detail, but this one has so much new stuff it's going to be hard to figure out what it's doing.
The comment(by a competitor) says that DNTMe sends back data, but neither the comment nor the areweprivateyet.com website backs up that claim. The latter just says that DNTMe is not very effective at blocking.
Since you mention that they sold out, I hope to know if there's more history on the subject, if things changed in the extension, or with Abine, and when that happened.