StartupReview has a great report on Rotten Tomatoes and how the site has leveraged SEO to drive significant traffic.

SEO traffic comprises up to 70% of our incoming traffic. We have a dedicated and loyal community of movie fans on Rotten Tomatoes (in fact, our forums and Vine community system is second-to-none when it comes to movies, I would like to think), but even a dedicated, active community is only a fraction of the browsing, drive-by traffic that the search engines will provide to you.

Seventy-percent! Keep in mind this is a site that has been around since 1998 and has a very loyal following. To say that in light of its userbase, the site drives 70 percent of its traffic via search is significant.

The question is, Are jobs like movies?

In many ways I think they are, just like any product these days. People tune out the messages until it's time to "buy."

"Oh, I just heard about this new movie and want to see what it's all about" and "I just found out I'm being laid off, where do I find current opportunities" all lead to the same place: Search.

A big difference is people are more interested in films on a regular basis than they are employment. Only the most aggressive and desperate job seekers are on job sites regularly.

All job sites will tell you that search is a primary way they drive traffic. Is it 70 percent? Probably. It should be, or else get a new marketing team.