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've come up with 2 ideas which I think will be useful for people trying to redeem something. 1) A separate filter for affordable awards. Depending on the amount of Soul Gems the user has, this filter should present the rewards redeemable which a person can afford with their SGs. 2) Reward goals, where a person can set a specific reward as their goal. And when he/she has enough SGs to redeem it, they get alerted.