How do you get key to treasure chest not member?

To obtain the key to a treasure chest in games that require membership, you can try completing specific quests or challenges that may reward you with keys. Alternatively, some games offer keys as part of special events or promotions, so keep an eye out for those opportunities. You can also check if there are any in-game purchases available for non-members that allow you to acquire the key. Lastly, engaging with the game's community or forums might provide hints or tips on how to unlock the chest without a membership.