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.
My friend is trying to sign up, so I asked him if he minded putting in my referral code, when he tried putting it in, it said code incorrect, anyone know what I can do about this?