I want to know this too. When I see thing like "This fixes the DMCA", it makes me question the intentions of the advocating website. It sounds too good to be true.
Hey, I'm the FixtheDMCA founder. I set the whole thing up, and really I don't have any ulterior motives. When I was in college (2003-2006), I wrote and sold software to unlock Motorola phones (back when the RAZR was big). It was my first startup, and was a lot of fun to build. But about a year in I was sent a cease and desist by Motorola for violating the DMCA, even though there was no copyright infringement involved.
A very lovely lawyer by the name of Jennifer Granick at Stanford Cyberlaw helped me out pro bono, the case was dropped, and Jennifer went on to petition the Librarian of Congress to have an exemption for unlocking added. That exemption was granted in 2006, renewed in 2009, then dropped in 2012. I haven't been in the unlocking business for a long time, but I thought I should do something about it. I started the WH petition, which got 114k signatures and a positive response from the WH. But I realized that the real culprit is DMCA Section 1201, it really is just a really poorly written law, and it effects a whole load of people. So, with the help of some friends (shout outs to Azat, Joe, Austin and Dmitri) we threw up the FixtheDMCA site over the course of three days, and I've been maintaining it since. Meanwhile I've been trying to coordinate with folks like the EFF and Public Knowledge who are pushing things on the DC side.
For me it's kind of a fun break from startups, and I kind of feel like it's paying back the favor J. Granick did to me back when I was a college student.
I would really love to hear some decent, reasoned arguments why the DMCA shouldn't be fixed (and by fixed I mean limited to cases of copyright infringement only), as I think at a certain point the content lobbies will probably start making them and I'd love to have responses ready.