Internet.org may not succeed at the end, because of the conflict of interests in many parties (corporate and political) involved in its running. But the idea of providing limited access for free is IMO very good and important, and arguing details before anything being done is at best unproductive.
All the people here already have internet access, and most without any limit or censorship. But can you try to think of this from POV of the users of internet.org? Not to think for the children in poor regions, but think AS those children.
Let me explain from my experience, where limit of access mostly comes from heavy censorship.
I was born in China at the end of the Culture Revolution. Fortunately, my family still had got TV when I was in elementary school, and we had internet when I was in high school. All the information, programs, news, cartoons, whatever contents from TV or internet were heavily censored. They were censored so heavily that I, as a kid, could not realize that they were censored at all. But I still enjoyed a lot of information, entertainment, knowledge from TV and internet as a kid. As an adult now, I hate and want to fight those censorship with all I have. But without TV or internet, I'd very unlikely to be able to code, or to write English, or anything I enjoy doing today.
To me, the limit of access that's forced by government doesn't differ much from the ones by corporates. But having some limited access to information is absolutely critical, when the ONLY other option is no access.