The latest Black Desert patch points to a friend referral program that is now online.
The plan now runs through April 22. You can earn rewards by inviting your friends to join Black Desert. Your friends always use your referral ID and can also earn rewards. The more friends you invite, the more rewards you'll get, including reminder snippets, Valks 'Cry, Cron Stone, Valks' hints, rare Shakatus boxes, etc.
At the same time, your friends can receive rewards after reaching certain milestones (for example, level earned or hours played). Rewards include a comprehensive aid set, 100g gold bars, pure magic black stone, Valks tips, and a 50% discount coupon.
Additionally, some activities have ended, such as Fortune Teller, April Fool's Day 2020, Knights' Pursuit, Charity Activities "Save Wild Animals", "Find Oasis", Event 1: Popular Time Drop Rate, Spring Boom and Spring Screen Screenshot Contest.