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Adsense has its way of computing your income which I guess out of our control, what you can control is your blog content then focus on that area.
good luck!
there is several way if we want to have earning from blogging. the usual way is start to put google adsense from your blog. and then you can do research about your visitors.
what i mean by research is you should know how many visitors in your blog per month , and how many adsense your visitors is interest for ( i mean click the adsense in your blog ) . and then make a conversion.
if there is 1 click / 100 vistors so you already have some dollar / cent in your pocket. and then try to raise your visitors … if you have 500 visitors you will get 5 click and so on …
campaign in adwords also help you to reach your targeted visitors … hope this help
cheers 
Thanks guys, I have reached my goal for $1 this month.
I’m not sure you’re being serious there 
Glad to hear that which way you finally choose ?
To earn by blogging is a great job. But I don’t understand why visitor donate $1 to blog? By doing affiliate we can earn money. (By placing other website’s banner or link on blog)
lots of traffic will simply mean bigger earnings…and what is great about it is that there is no limit to what one can earn
The Google AdSense way but still need more traffics. All I need is 2 clicks within a month on the ad then i will have $1.
You can’t use Adword campaigns for AdSense sites. It’s not allowed.
1$/month that’s not a goal, unless you are planning to open 100 blogs .
If your earnings are zero then $1 per month even a goal. you have to reach that before reaching $100.