When you signed up with JVZoo, you were asked if you agreed to the Terms of Service. The Terms of Service allow JVZoo to automatically be an affiliate for any product that you add to the system. The Terms of Service are located here: https://www.jvzoo.com/legal
The seller agreement can be found here:
The JVZoo affiliate name is BBC Systems, Inc on the transaction payout details for any transaction where JVZoo is the affiliate.