I had the exact same experience recently. I was credit-card-in-hand ready to pay $500+ for a job posting on their site, but there was no way to do so. Then when they finally called me back, they gave me this story of how they were "didn't want to be thought of as a job postings site as they were far more than that" and said the only thing they would sell is subscriptions of multiple job postings a year. I ended up posting on some competing sites - I'm surprised they're willing to lose out on willing customers like this!