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'm currently doing the Crossout tasks and when I completed the first task. It took me 8 attempts for gamehag to accept my screenshot. Nothing was wrong with my screenshot. But because whoever looks at the screenshots is blind. You have to go onto paint and circle the task being completed and also point out your Gamertag. Then they will accept your screenshot.