Long ago you had the website tournament.com with hl 2 dm and css. 10 players go into a match and put in 1$ each for example and then the first 3 wins cash. Also other game modes with other ways to win cash but also free games with bonus cash. I used to play that website for a few mouths it was really fun didn't became rich from it but a fun extra. But what i'm meaning with this post now. Could quake live also go that way?
If you wanna know what tournament.com is search youtube and you will find movies about it. I'm also on it search xkillerz.
Tournament.com is no more it closed down because off to less players.
But back on topic if they didn't discussed something like this yet then I like to suggest it to ID.