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.
no matter why it's already used/duplicated
https://gamehag.com/forum/t/30387-one-steam-key-for-woodle-tree-adventures7
https://gamehag.com/forum/t/30245-two-steam-keys-for-woodle-tree-adventures1
reposting everytime it seems