Last year i used to make upto $20 with 80-100 clicks. Now just today it has 60 clicks but just $3.70 I think thats as horrible as one can imagine. But whats the choice, i guess none. Chitika, adbrite, kontera are not very appealing and eye catching, they dont get enough clicks.
My goodness, have you gone through the ad blocking thing? (not allowing low paying (aka: MFA site ads) on your adsense control panel? 3 clicks for me today was around 2.50, so people are paying for clicks... seems like MFA has targeted your genre though...
What kind of field are you in? The field you are in may be suffering possibly and people are leaving because they are not making enough money causing the money to go down on your end. Just my 2 cents on the situation.
You might of got smart priced, time to move around your ads maybe remove some get a higher CTR and you should be back up to your old range.
Your account might be in adsense smart pricing remove come ads or change add placement add more content on your website will help u.
Like the other one said , you might have been smart priced . Try to reduce the number of ads on your page . This always helps
Try to use some adsense filters so that you can prevent some low value ads or MFA ads and let us see your adsense income starts rising