Announcement: Classic Tease Of The Month for March 2016 posted 2 days ago
Because it was founded by people like you. People who were annoyed that most sites out there were created to make money. Sure, we need to pay for our servers, too. But that doesn't mean we have to put one gazillion banners all over the place.
The idea of a website is to provide something useful. And because of the nature of the web, there is no reason to keep it behind closed doors. Instead, we are giving it out to everyone interested.
We recently (November 2009) started running some ads and it currently covers part of our hosting expenses. In the future we hope to add some other revenue sources with the goal of fully covering our costs. If we ever manage to generate a surplus it will go into things that help the site such as development of new features or maybe some advertising.