Not talking about conversions or product sales here. Do you ever use PPC campaigns strictly for the purpose of getting more traffic to your website?
I have never used it to drive traffic for the sake of it, but have used it only to promote products and increase sales on some products I was promoting. But why would you want to drive traffic if you are not interested in increasing sales?
I'm with PPV Affiliate - it will definitely increase traffic. That part of PPC is pretty much gauranteed!