AdSense by Google - is it true that i can earn here?

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hey , , i just joined adsense , , i submitted my website , , and google is currently processing my application form , , any adsense members here? , , on the average , , how much do you earn? , , are there any bad experiences? good ones? , , please do share it with me , , i would really appreciate it , , ;- i wanna know more about adsense , , you are free to tell all about it , , thanks a lot , ,