Play games
Choose the game that interests you and play itfor free.
Complete the tasks
Every game has some tasks 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.
Have any of you invested in skins/stickers, or other Steam items? I recommend you guys invest in the agent skins, they've dropped in price and when the operation is over they will go up in price.