Companies / People who blog about new urban technologies.
Links link to links, and webpages follow webpages of information.
It's like finding a new song you like on Youtube and then you get stuck in whatever section of Youtube because you keep clicking on songs that are recommended/ are similar to the song/video you listened to/saw.
It's the same with these blogs, similar blogs are linked to similar blogs.
So I can end up in the urban tech side of blogs once in a while just by clicking links. :)