Hazel,
There is a fair bit of history with revsharehosting and many of the linklist owners that post here...
http://www.greenguysboard.com/board/...evsharehosting
http://www.greenguysboard.com/board/...evsharehosting
http://www.greenguysboard.com/board/...evsharehosting
Short answer is RevShareHosting is classed as free hosting by most of us as, there is no outlay on the part of the webmaster before they can submit sites to me(us) - that makes it free..
.. and yes we have had the "it costs me a %" argument...
DD