Within the Gnosis Referral Campaign, there's 4 tiers:
Casual Earner : Up to 2 people joined Gnosis App with your referral link
Ambitious Earner : Between 3 to 4 people joined Gnosis App with your referral link
Power Earner : Between 5 to 9 people joined Gnosis App with your referral link
Top Earner : More than 10 people joined Gnosis App with your referral link