Name of the plugin you want:
ReferralSystem [MySQL|SQLite] [PlaceholderAPI and LeaderHeads] ✪ 2.7.1
Spigot Link:https://www.spigotmc.org/resources/%E2%9C%AA-referralsystem-mysql-sqlite-placeholderapi-and-leaderheads-%E2%9C%AA.29709/update?update=139562
Price: 9.99
How it would contribute...