Content Philosophy:

It's much easier to convince them there's a real problem if I can say "Look, I can get your phone number and username from the Internet just like that" rather than explaining theoretical reasons why they're vulnerable. Their dismissal was at least framed as "well that's a lot of data, so it's not going to happen! The cities on the left are not being mapped to area codes on the right, although they will be in roughly the same order. Maybe they have already made enough money or are confident they will and now want to get their name into history by building great company. Did he just stop his HTTP server? Privacy was a key selling point.