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 think it does because you see a gun on the ground with no skin, yoou pick it up and a skin appears randomly with is very unrealistic. Edit: Guys, I meant the Gun Skins.