I started on Gumtree, offering massage. Had to include the disclaimer 'THIS IS NOT A SEXUAL SERVICE'.
Got plenty of clients but since finding AW, I have not looked back. AW is a great site for me. No need to pay fees (as I don't cam, etc) and only use the basic service. Can add photos of myself and state exactly what services I am offering. Plus it provides a level of security, with feedback, etc, which Gumtree doesn't.
Thinking back, I took a lot of risks with punters via Gumtree. Wouldn't recommend.