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 tried 3 times to send screenshot of my 15 wins and i was rejected so if there is anybody who would like to help me i will appreciate it.