I like it. The web is full of people who aren't really programmers who are using it to make money. That's how I got into programming a decade ago.

They'll learn to make a rating system if they really feel the need (making a reasonable one is not rocket science) but offer them a slick one that's easy to integrate on the webpage where they're selling their e-books or vinyls or whatever and I imagine they'd pay for the usage.