I should warn everybody about SlicethePie. I have been a member of slicethepie for about three or four months, and while everything was going great, they are quick to lock your account for any type of reason, even when you are not breaking the terms and conditions. I made sure each and every time I used that website that I was not breaking their terms and conditions, and my account still got locked. So I would just watch out for that. That is just my personal experience with the website though. It may be different for other people.
What has made PayPal so popular among both consumers and merchants, or clients and contractors, in this case, is that it is secure, allows for international payments and payments can be received almost instantaneously. When someone sends you a payment it arrives in your PayPal account within minutes compared to days when receiving an ACH deposit in your checking account or check by mail.