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 am a little bit confused. Here at Gamehag you can withdraw skins, but there is no condition mentioned. Skins value depends highly from float, is it possible to check condition before withdrawing?