That's a silly question. And the answer is no. A real author creates their work with their minds not with round table RPs. Heck, I do text-based RPs, I love it, given if it's good, but I don't plan on creating a novel from it. I have my own ideas from my own mind not with another person or what not.
Think, did famous writers RP before the internet was born? They just had a pen and a piece of paper.