I didn't get to test the full effect of a big downline yet (I just got the tool) but I can tell you the rest of the site works exactly as stated--my links got clicked, I earned credits, and my ads got displayed. Traffic Annihilator even tracked my results so I know how many clicks and how many ad displays. That was an impressive unadvertised extra feature.
With Facebook ads, you can identify new potential leads by defining your ideal customer through the ads platform. Then, Facebook allows you to serve your ad content to those who exhibit the same types of behaviors that your target audience does. As you drive more relevant traffic to your brand site, you can improve outcomes, no matter what your ad goals may be.