As of this week's update for Counter: Strike: Global Offensive, players can now link their Steam accounts on Twitch. This is something you'll want to do if you're planning to catch the 2013 DreamHack SteelSeries CS:GO Championship.
By watching these live tournament matches on Twitch or GOTV, you can earn keyless DreamHack Winter 2013 Souvenir Packages. These are said to have tournament-quality items, so, yes please. Or you could just watch for the inherent thrill of competition.
Linking with Twitch [Counter-Strike]