that's copied from gamehag FAQ: "Please, verify carefully if you put the correct link to your Steam account by entering the settings of your profile. If it is OK, then make sure that you don't have a blockade of the Steam Community Market and that your profile is public to enable the sending of a reward. Remember that a delivery of a skin can sometimes take more time. "
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.
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I ordered my first skin and I don't know how much time will take , I always get instantly in other sites that's why I'm asking