There really are over 15,000 places online that will run your employment ad for a fee. It's much easier to send a resume and be rejected by an employer than to stand in front of that employer and be turned down in person. The Internet is just a new way to avoid rejection. The difference today is that a hiring company can not afford to ignore a potential worker simply because they are risk averse. In a dwindling pool, that's all of the supply.
Investment is required to ferret out the potential candidates.
Long after Job Boards have moved on to the second and third generations of Internet Recruiting, the basic model set by Hot Jobs will remain intact. You have to advertise to the folks who are watching football, biking, driving their cars, playing with their kids and so on. Job Hunters are scarce and candidates aren't where they used to be. Read the interview. Here are a couple of snippets from the exchange.