Meta's current invite post requires a new user to redeem the code in Muse Settings within 48 hours of joining; both accounts receive 1 billion in-service Muse tokens. The rollout has described a limit of 20 to 30 redemptions per code, including a 30-use version, so the account's current prompt controls. Muse is currently rolling out in the U.S. and its App Store listing is rated 18+. This is a dynamic, limited-time promotion, tokens are not cash, and Meta does not publish a durable standalone referral-rules page.