Play games
Choose the game that interests you and play itfor free.
Complete the quests
Every game has some quests for which you will receive Soul Gems.
Receive rewards
You can exchange your Soul Gems for Steam Wallet top-ups, game keys, CS:GO Skins and other rewards.
I think the entire rewards aspect of the site needs some work. For example, the availability of rewards should be made immediately clear, it's a bit annoying working your way up to a reward only to find out it's not even available. On top of that, small things like not making the fact that you need level 3 for the rewards immediately clear is even more annoying. I know they do this on purpose and intentionally make it less visible so that users don't realize until after they have all the gems, but I just think that's honestly kind of pathetic and makes me feel even more unsure about withdrawing anything on here.