i mean best pay is to jsut play games that you havent played before, most rewards are jsut given for normal stuff. litteraly jsut play the game is the fastest
I think best method is to watch ads on android in the app zone you can get 100 gems from it a day hope this helps 
Dailey login and steam chest , do this everyday It's the best way for me
in 3 steps
Choose the game that interests you and play itfor free.
Every game has some quests for which you will receive Soul Gems.
You can exchange your Soul Gems for Steam Wallet top-ups, game keys, CS:GO Skins and other rewards.
You know that on Gamehag you can get real rewards for free, right? Join us, complete walkthrough and get your chest!
Need tips and tricks pls