The Avaddon ransomware family first appeared in the threat landscape in February 2020, and its authors started offering it with a Ransomware-as-a-Service (RaaS) model in June, 2020. In August 2020, cybersecurity intelligence firm Kela was the first to report that the Avaddon. operators offered to their partners an initial 25% cut on the ransom, a percentage that could for higher volume affiliates. The reputation of the gang rapidly grew in the following months, the group became one of the more aggressive ransomware operators.”]
Source: https://securityaffairs.co/wordpress/116282/cyber-crime/avaddon-ransomware-evolution.html