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.
They even mention me RECENT REWARDS on main page, but I didn't got my reward yet and they said that I already got it. https://ibb.co/jOmr9d https://ibb.co/eLJhFJ Though it an honor to be on recent reward list but please don't tease me and already rewarded me plzzzzzzzz ;( or I will cry to death.