If now Peter signs up on MergeDEX using Marie’s referral link, he becomes a 1st level user of Marie, a 2nd level user of Jane and a 3rd level user of John. For Marie, this means that 25% of the trading fees paid by Peter will be sent to her. For Jane, it means that 10% of the trading fees paid by Peter will be sent to her. And for John, it means that 5% of the trading fees paid by Peter will be sent to him.