[Bob]

Not even a finders fee or the cost of listing? I would think she is making something. Maybe customers like Angie’s lists who pay a fee

She could be using Google AdSense, affiliate links, banner ads, or any number of other ways to monetize her site. Those would have nothing to do with the properties that she's listing (other than the fact that same people who view the listings would also see the ads).

[freekitty]

Makes sense