Are paid listings for you? These paid listings are not useful for every website but it does have its useful, its great for websites that have frequently changing content such as deal of the day. Sites with pages that can not be found and crawled by the search engines.
There are several benefits of having paid listings such as getting listed quickly and staying in the index, it also leads to being crawled frequently some even offer tracking. The drawbacks are that being indexed and crawled still does not help your sites relevancy and you will be paying for the listing service and possibly even per click.
For the majority of sites link building is a much better option by building links to and within your site it will be indexed by the search engines. When it comes to looking for a paid listing there are many options that can be considered but the only major search engine that offers this service is yahoo.