Your site is down for me, but I guess it's either invalid clicks or too low paying ads (something like $0.01 per click, after Google takes its share you get almost nothing).
hey I noticed you are using pay-ads.com on your site. Do you actually get a $3.50CPM off them? I added them a few days ago and havent earned 0.01$ yet. sorry for hijacking your thread
As m in GMT Time zone, I always find price in daytime is much lower than night, dunt know why...confused
adsense become insane in the last weeks , anyway try to focus the contant on your site to help the ads match