And many others as well. Too bad this isn't usually the way it works. Free advertising tends to appeal more to the person posting the ad than to the person the ad is intended for. Oh, I'm not talking about ALL free advertising. Hopeful online entrepreneurs post free classified ads everywhere, taking advantage of every promotional opportunity they can find.
Classified ads are effective - in certain situations.
For example, classified ads placed in ezines or newsletters can make you a tidy profit if done properly. Promoting your business by using free classified ads or links is usually over-hyped. There are literally thousands of sites out there where you can submit your ad, for free. But many of these are low-traffic sites or they're sites which are not well known. I've tried it.