Github is a large bloated organization that's slow to move, more news at 6.
I don't see how it should shock anyone that its taken Github 29 days to respond. Github can't move at the speed of say, an open source project with a hand full of contributors. They're a company of 100s of people. And the larger an organization is, the harder it gets to make a decision about anything, because more people have to agree. In this case, they have to agree about how to respond to open criticism while saving PR face, which is a difficult task.
I'm fairly confident that the stink this whole Dear Github thing has raised will result in positive changes of some kind, but let's be real, Github is still just a corporation that faces a lot of the same problems other corporations face. They're probably scrambling to get a whole bunch of people to agree on what it is they should do.
I guess the real trick is to build your own business, but it keep it small enough that you don't end up exactly in the same place, but with yourself at the head of it.
Find yourself a tiny niche, fill a need for just enough people that you can keep yourself gainfully employed doing something you care about, and not have to worry about hiring other people to work under you and all the other shit that comes with building a company. Stay small and lean. You won't get Facebook rich, but maybe you'll be happy.
I was just about to comment on the login wall. You should consider at least including a tour, so people can see what this site actually is before signing up.
Surprise of the century, Peter Molyneux doesn't deliver on his promises. Still waiting for that acorn to grow into a mighty oak Molyneux, you silly bastard.
Honestly, my biggest issue with this landing page is the dummy text in the screenshots. Its nitpicking for sure, but it would look nicer if you took the time to give the projects realistic names in the screenshots and whatnot. Also that Sign In button needs another 5-10px of margin at the top.
Otherwise its a very nice landing page in my opinion.