As of , "Bonus Codes" for global rewards are rare, as they are often released during milestones (like hitting 5,000 daily players) or holidays. As of , "Bonus Codes" for global rewards
Even if you are a veteran player with maxed towers, free Gems are free Gems. For new players, these codes are a lifeline. They allow you to skip the tedious early-game coin grind and jump straight into buying useful towers. grim defender codes
You're referring to the Grim Defender codes!
These are used for the referral system. Both the inviter and the new player receive rewards when a code is used. Example format: ob2o3mk , ew5qff6 , ghr7ref .