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.
SHOULD I DO THE TASK. It seems like a pretty easy one, but I'm not sure if it works, considering the threads that say that this task is impossible. However, only two people said this, so I need to know if it is actually true.