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'm those people who don't really want to play games, and instead report spam. Recently, I reported a whole thread that was just complete spam, like" asusdhiwfeuh", or things similar to it. I checked the thread the next day, and all the comments were removed, yet, I didn't get any SG from it. Is it because I abused the reporting button or something?