I used to write for CustomPapers on a contract basis and found them to be honorable, helpful and fair. I don't write for them now; but I feel a real fondness for the company. I was hired during a very desperate period in my life and had to send them a W9 form. I applied to many companies; and was offered independent freelance writing positions by quite a few that seemed sleazy. One company wanted me to write assembly line fashion without appropriate attention to the work. Not Custom Papers. In fact, they offered email contact with writers so that I could contact them when needed as well as encouragement and praise that I don't see too often in my new higher paying and full-time position.
Occasionally, [once or twice] there were aspects of a paper that needed changing because my client emailed me he had some issue with that. I changed them. Once, the customer asked for changes that were not represented in the original request. They paid a fee for me to add to the paper (I assume they must've asked the client to pay for revision or something too).