Earlier quoted context omitted.
I had a feeling that sentence was going to be taken apart and thought I should change it, but I didn't have the words at the time. By "profit-making companies", I mean companies that work on products for people that are not directly designed to help an impoverished people or solve a health or social problem. That is being implied here. He calls out the "sexting apps" directly, but most of the article is about him rec…
Again, I think you're arguing against something that is not actually in the article. I read him as pointing at ends of a continuum, and I think you're falsely constructing a dichotomy out of that. He says quite clearly: "I’m still a believer in technology, particularly in the web platform, as a force for good." He also is explicit that for himself he wants something farther toward the clear-impact end of the spectrum…
"Even though I’m still a believer in technology, particularly in the web platform, as a force for good, society needs more people working directly on problems that matter."
While the author acknowledges in the abstract that the internet has improved people's lives, I still see the tone implying we should all be directly working on more worthy causes if we really want to be doing stuff that "matters".