I see many providers of such traffic, pop-unders/expired domain for about $300-$600 for 400k visits. Has anyone used those and willing to share their experience? Do you think those are good for kick-starting an informational/viral website? And for accumulating fb likes/shares? Or is it completely garbage traffic that will do nothing, regardless of the website I send them to? I know there's a paid traffic section, but no one visits it and this is not about PPC/media buying.