FFA pages means free for all web pages. It easily allow to post a hyperlink directly to them at free of cost and also without the link back. The main truth and lies about this strategy is, when you advertise your own web site’s WEB LINK on a large number of FFA pages you may be bombarded with traffic and page views and boost your website link popularity and search engine results positioning.
FFA pages are likely to be designed to scroll. As latest links are added previous kinds just keep moving farther and farther down the page. So if you want to conquer this particular negative problem use this strategy whenever new links are added you would need to repost your advertisements again to getting top result
In short this is just an another name for Free Classified Sites