The Crystal Mining Invest offers a three-level referral system. Your reward is 7% of every investment a direct referral of yours makes and 3% of deposits made by your second-level (indirect) referrals and 2% for the third. To receive referral rewards, you don't need a deposit of your own. Just create an account and invite friends by giving them your referral link. When your referral makes a deposit, the commission amount will immediately arrive at your account.