I have a website with more or less 1400 pageviews/day (2400 impressions) and have no cliks at all (well, yes... one or 2 a month). Ads are very vissible and most of the people interact with the site. I have a small banner in the right and another big one (300x600), both visible and user friendly. I tried with AdSense (not banned) and Chitika with the same results.
I have another 2 sites with 300 pageviews/day each and again... I only get 1 or 2 clicks in a month.
Is that normal? Specially the first case, because most people interact with the site.
After a lot of effort and time writing content for years I'm about to give up