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 have well over 1800 hours playing this game and i can honestly say it's come along way from where it started, if you're looking for fast paced pvp dogfights with common shooter elements then this will be a fun game for you very pay to win, but skill will always win over money.