Worth mentioning is this site that allows the use and trading of bitcoin against gaming items and professional games. You can bet which teams will win in a match for in game items or Bitcoin which can be quite profitable if you know your game well and can predict team performance on the day. Covers a few different games, counterstrike is the one Im mostly interested in but its also DOTA, League of legends and Smite.
Check it out if you have items on steam to sell or trade as its easy to use for that outside of betting. I have no connection with them apart from being a user of bitcoin there and here
