OK, say you have a Twitter account and you're sending on target traffic to someone's website. If you were charging per 1k (via tracking how many people click the links in your tweets), how much would you charge? Keep in mind this is the most on-target you can wish for. It's not one of those Fiver campaigns which may be on target, but some won't be. Example: A Twitter account which is purely for people to follower who are interested and love Widgets > is tweeting about Widgets and including links to a website all about Widgets. I know from past experience that 1,000 visitors can get you a £2-£3 on Adsense alone, which is without any affiliate offers.