Play games
Choose the game that interests you and play itfor free.
Complete the tasks
Every game has some tasks 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.
On the gamehag page, it says you can get infinite soul gems by talking on forums, but I don't get Soul Gems I get xp, can someone explain please?