Playing games is the most efficient way, however the screenshots are commonly rejected. Don't play mobile games, that works even worse. So anyway... Just play games on pc, it is the fastest way. I recommend Guild Wars 2: 1700 sg after 15 minutes (only catch: you need to download something like 6-7 gb)
What about the mini games?
on my point of view...i prefer to do the app zone on my smartphone...offerwall seems didn't work for me for quiet long time ago...other than that playing games may be prefered by many people but not me apparently...not worth the hassle since the payout varies on different country...
Easiest - App Zone
App Zone bro
Use rune from free chest when you are earning soul gems, that's more efficient
Watching ads.
Mens thank for info
If it involves downloading gigs at a time... takes me 2 hours to download 1.5GB...
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!
I just want some csgo skins :(