It all depends on placement, blending techniques, and targeted ads... not to mention that users must want to click on the ads...
One of my clients pulls $150 per day, myself i pull like $3/day, and another client pulls $6 a day... so it can really vary quite a bit...
You do get some for views, but it's quite miniscule...
You cannot publicly state that you want people to click on ads, it's against the AUP with google; you can however word it such as "Support our Site" and "Visit a Supporter" or "Our Sponsors", etc.
They count how many ips click links so your users can't go overboard; they do NOT want fake clickthroughs...
They give some leniancy to proxies, such as AOHell...
If you sign up, you can use me as a referral
... gizmo@undergroundnews.com