What are the advantages of professional membership for ProZ*Pay payees?

ProZ.com membership advantages for getting paid via ProZ*Pay

We have found that typically the payer pays the fees for making a payment to a language professional at ProZ*Pay. If your client is not a business member at ProZ.com, the fee for paying you as an individual through https://www.proz.com/pay is discounted to 3.9%. 

Where payrolls are shared in advance of pay day. Members can request an advance at 2% fee, while non-members pay 5% to receive the money from ProZ*Pay prior to the expected pay day.