Referral
Invite friends with your referral code. You get a reward once they've played for a while, not when they enter the code.

How It Works
You get a random 6-character code the first time you open the referral menu. You can change it later to 3-16 letters, numbers, or underscores, with a cooldown between changes.
New players can redeem a code with /referral redeem <code> during their first 24 hours on the server, and they get a welcome bonus straight away. The referrer's reward waits until the new player has played for about an hour, so throwaway accounts can't be used to farm rewards.
Your referral tier sets how much each completed referral pays, and you can pay to upgrade it. Milestones, such as your 10th completed referral, pay an extra bonus.
The leaderboard (/referral top) only counts completed, paid-out referrals. A friend who redeemed your code but hasn't played long enough doesn't count yet.
Commands
/referral- open the referral menu (your code, stats, tier upgrade, redeem, your referrals, leaderboard)/referral redeem <code>- use someone else's referral code (only works within your first 24 hours, and only once)/referral code <new code>- change your referral code (subject to length limits and a change cooldown)/referral top- open the referral leaderboard