Valve has no idea why almost 30 percent of TF2 players spend cash in the game
http://www.joystiq.com/2011/10/25/valve-has-no-idea-why-almost-30-percent-of-tf2-players-spend-cas
Pyro Maniacs: Achieving Nothing in TF2 | Rock, Paper, Shotgun
http://www.rockpapershotgun.com/2008/06/21/achieving-nothing
"This isn’t a rant for or against Team Fortress 2 Achievement servers. It’s a recounting of the bizarre/hilarious/terrifying experience I had on one of them – yes, my personal reactions to what I encountered do inevitably slip in, but mostly it’s a portrait of this unique facet of gaming subculture. Whether you agree or disagree with their existence, these beat-the-system servers are fascinating enough to be worth talking about."
TF2__DELICIOUSLY_CAKEY_by_wandamagi.jpg (JPEG Image, 1570x354 pixels)
http://img.photobucket.com/albums/v15/MrDelish/tuftoo/TF2__DELICIOUSLY_CAKEY_by_wandamagi.jpg