I have yet to try it, but having seen some in action, I think the problem with host quote and lead services is that you are in competition against many other hosts who are offering different things at different prices. I know some friends however who practically gain all his new clients from host quoting services - his offers are very cheap indeed.
My strategy so far has been to try to keep clients happy - they do refer you when they have the chance to. But my hosting services are not to the larger scale yet, and I'm sure I will be looking into other means. Suggestions welcome.
Happy new year 🙂