I won’t keep you in suspense, the answer is “Yes”.
A site called Listasaurus.com will pay you 25 cents for every ad you place in the following categories:
* Free Stuff
* Stuff for Sale
* Real estate (non-commercial ads only)
* Rentals (non-commercial ads only)
* Vehicles (non-commercial ads only)
On the other hand, you get charged $10 to leave an ad in the Business Opportunities section. So I doubt this will be a popular place for Internet marketers to leave ads, unless they have fairly liberal guidelines for the Free Stuff section.
But you can expect all the other sections to be very popular!