Grind games and tasks. It's surprising but possible xD
Doing a lot of tasks, activating a Tiwaz rune and submitting them all in one go
wow,Amazing！！！
yeah hard as aama
writing lots of good articles daily with the Ansus rune, and doing every single game tasks every hour. You'll earn 5000 soul gems daily if you do all of that Every. Single. day. guaranteed losing your eyes because of the monitor screen!!
as @addwrd said, rewards from tasks differ tremendously from a country to another. same with the games available for you. if you're one of those who have 200sg maximum reward for a game you'll sure see it impossible. I don't think it's from GH's side tho.. it's games that favor some countries over the rest.
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!
How the heck people get that much SG in a single day??